After the arrival of a transport at the ramp in Birkenau, the process known as selection took place. SS officers decided who would be taken to work, and who would be sent directly to the gas chambers. Often it was mere chance or the mood of the SS officer that decided whether someone died immediately or had a hope of survival. The prisoners selected for slave labour were sent to one of the many auxiliary camps at Auschwitz or elsewhere in the Nazi concentration camp system. Their aim was „Vernichtung durch Arbeit“ - extermination through labour.
In the spring of 1941, German conglomerate I.G. Farben established a factory in which its executives intended to exploit concentration camp labor to manufacture synthetic rubber and fuels. I.G. Farben invested more than 700 million Reichsmarks (about 2.8 million US dollars in 1941 terms) in Auschwitz III. From May 1941 until July 1942, the SS had transported prisoners from Auschwitz I to the “Buna Detachment,” at first on foot and later by rail. (Between July and October 1942 there was a pause in transports, due to a typhus epidemic and quarantine.) With the construction of Auschwitz III in the autumn of 1942, prisoners deployed at Buna lived in Auschwitz III.
Officials and lawyers in the Third Reich were also intrigued by anti-miscegenation statutes, because the policing of sex was necessary to cleanse the Aryan race. Hitler, who had been largely asexual during his crucial years as a failing painter in Vienna, was obsessed with sex and blood. The United States at the time was a global leader in banning mixed marriages, going so far as to criminally punish those who defied the law. (Many of these laws were not struck down in the United States until the Supreme Court’s 1967 Loving v. Virginia case.) The Prussian Memorandum explicitly invoked U.S. laws that promoted segregation to maintain racial purity, and the sexual morality of white women in particular. Similarly, the third Nuremburg Law expressly forbid marriages and extra-marital relations between Germans and Jews, and promised hard labor in prison for law-breakers. The more one reads about the American and Nazi fixation on race, the more evident it becomes that at the very core of racist ideology is a primal fear of sexual inadequacy, of pollution, of mixing. Racial nationalism, the ideology of the Nazis, took this idea to its logical end.
Nazi ideology advocated excluding women from political involvement and confining them to the spheres of "Kinder, Küche, Kirche" (Children, Kitchen, Church).[181] Many women enthusiastically supported the regime, but formed their own internal hierarchies.[182] Hitler's own opinion on the matter of women in Nazi Germany was that while other eras of German history had experienced the development and liberation of the female mind, the National Socialist goal was essentially singular in that it wished for them to produce a child.[183] Based on this theme, Hitler once remarked about women that "with every child that she brings into the world, she fights her battle for the nation. The man stands up for the Volk, exactly as the woman stands up for the family".[184] Proto-natalist programs in Nazi Germany offered favourable loans and grants to newlyweds and encouraged them to give birth to offspring by providing them with additional incentives.[185] Contraception was discouraged for racially valuable women in Nazi Germany and abortion was forbidden by strict legal mandates, including prison sentences for women who sought them as well as prison sentences for doctors who performed them, whereas abortion for racially "undesirable" persons was encouraged.[186][187]
Entrance is free in general, but visitor numbers are regulated by a ticket system. Be aware that because of the large numbers of visitors, entry to the Auschwitz I site is done exclusively on a paid guided (yet unfortunately rather rushed) tour between 10:00 to 15:00 during the period from 1 April to 31 October. You can visit the site on your own (which is highly recommended, as visitors can go at their own pace, see what they want to see, and have a much more meaningful experience) if you arrive before 10:00 (better 8:00-9:00) or after 15:00 (depending on the season and day of week). This is recommended if you're staying nearby in Katowice or Kraków and don't have your own car, with some trains from Kraków and Katowice Główny arriving between 8-10. Guided tours cost 45PLN (discounted price for students up to 24 years of age is 30PLN). Students with an ISIC card are granted free entrance during tour hours. If you're a small group (~4 or less), it's not too hard to buy tickets on site (but depending on the season, you might have to wait depending on availability), but larger groups should book tickets in advance.
When Soviet troops liberated Auschwitz on January 27, 1945, they found these pitiful survivors as well as 836,525 items of women clothing, 348,820 items of men clothing, 43,525 pairs of shoes and vast numbers of toothbrushes, glasses and other personal effects. They found also 460 artificial limbs and seven tons of human hair shaved from Jews before they were murdered. The human hairs were used by the company "Alex Zink" (located in Bavaria) for confection of cloth. This company was paying the human hairs 50 pfennig/kilo.
When the 322nd Rifle Division of the Red Army liberated Auschwitz on 27 January 1945, the soldiers found 7,500 prisoners alive and over 600 corpses.[248][249] Auschwitz II-Birkenau was liberated at around 3:30 p.m., and the main camp (Auschwitz I) two hours later.[250] Items found by the Soviet soldiers included 370,000 men's suits, 837,000 women's garments, and 7.7 tonnes (8.5 short tons) of human hair.[248][249] Primo Levi described seeing the first four Russian soldiers on horseback approach the camp at Monowitz, where he had been in the sick bay. The soldiers threw "strangely embarrassed glances at the sprawling bodies, at the battered huts and at us few still alive ...":[251]
His strategy proved successful; at a special party congress on 29 July 1921, he replaced Drexler as party chairman by a vote of 533 to 1.[63] The committee was dissolved, and Hitler was granted nearly absolute powers as the party's sole leader.[63] He would hold the post for the remainder of his life. Hitler soon acquired the title Führer ("leader") and after a series of sharp internal conflicts it was accepted that the party would be governed by the Führerprinzip ("leader principle"). Under this principle, the party was a highly centralised entity that functioned strictly from the top down, with Hitler at the apex as the party's absolute leader. Hitler saw the party as a revolutionary organisation, whose aim was the overthrow of the Weimar Republic, which he saw as controlled by the socialists, Jews and the "November criminals" who had betrayed the German soldiers in 1918. The SA ("storm troopers", also known as "Brownshirts") were founded as a party militia in 1921 and began violent attacks on other parties.
Auschwitz became one of the camps used for the mass extermination of Jews. In summer 1941, Heinrich Himmler gave orders to Auschwitz commander Rudolf Höß to build a centre at Auschwitz for the mass murder of Jews. In September 1941, the lethal effects of Zyklon B - a substance normally used for pest control - were first tested and verified there. Later, four large gas chambers were built at Birkenau, capable of killing up to six thousand people each day. The gas chambers were disguised as showers, meant to persuade the victims that these were disinfection measures which they had to undergo before they were sent to work in the camp.
The Nazis took things further, one step at the time. Jews had to start wearing a Star of David on their clothes and there were rumours that all Jews would have to leave the Netherlands. When Margot received a call-up to report for a so-called ‘labour camp’ in Nazi Germany on 5 July 1942, her parents were suspicious. They did not believe the call-up was about work and decided to go into hiding the next day in order to escape persecution.  
What would it mean for a writer not to hide the horror? There is no mystery here, only a lack of interest. To understand what we are missing, consider the work of another young murdered Jewish chronicler of the same moment, Zalmen Gradowski. Like Frank’s, Gradowski’s work was written under duress and discovered only after his death—except that Gradowski’s work was written in Auschwitz, and you have probably never heard of it.
The K.L. was defined from the beginning by its legal ambiguity. The camps were outside ordinary law, answerable not to judges and courts but to the S.S. and Himmler. At the same time, they were governed by an extensive set of regulations, which covered everything from their layout (including decorative flower beds) to the whipping of prisoners, which in theory had to be approved on a case-by-case basis by Himmler personally. Yet these regulations were often ignored by the camp S.S.—physical violence, for instance, was endemic, and the idea that a guard would have to ask permission before beating or even killing a prisoner was laughable. Strangely, however, it was possible, in the prewar years, at least, for a guard to be prosecuted for such a killing. In 1937, Paul Zeidler was among a group of guards who strangled a prisoner who had been a prominent churchman and judge; when the case attracted publicity, the S.S. allowed Zeidler to be charged and convicted. (He was sentenced to a year in jail.)
Poles were viewed by Nazis as subhuman non-Aryans, and during the German occupation of Poland 2.7 million ethnic Poles were killed.[342] Polish civilians were subject to forced labour in German industry, internment, wholesale expulsions to make way for German colonists, and mass executions. The German authorities engaged in a systematic effort to destroy Polish culture and national identity. During operation AB-Aktion, many university professors and members of the Polish intelligentsia were arrested, transported to concentration camps, or executed. During the war, Poland lost an estimated 39 to 45 percent of its physicians and dentists, 26 to 57 percent of its lawyers, 15 to 30 percent of its teachers, 30 to 40 percent of its scientists and university professors, and 18 to 28 percent of its clergy.[343]
In August 1934, civil servants and members of the military were required to swear an oath of unconditional obedience to Hitler. These laws became the basis of the Führerprinzip, the concept that Hitler's word overrode all existing laws.[203] Any acts that were sanctioned by Hitler—even murder—thus became legal.[204] All legislation proposed by cabinet ministers had to be approved by the office of Deputy Führer Rudolf Hess, who could also veto top civil service appointments.[205]

Annelies Marie Frank (German: [anəˈliːs maˈʁiː ˈfʁaŋk], Dutch: [ɑnəˈlis maːˈri ˈfrɑŋk]); 12 June 1929 – February or March 1945),[3] commonly known as Anne Frank (German: [ˈanə], Dutch: [ˈɑnə]), was a German-born Jewish diarist. One of the most discussed Jewish victims of the Holocaust, she gained fame posthumously with the publication of The Diary of a Young Girl (originally Het Achterhuis in Dutch; English: The Secret Annex), in which she documents her life in hiding from 1942 to 1944, during the German occupation of the Netherlands in World War II. It is one of the world's best known books and has been the basis for several plays and films.

The gas chambers worked to their fullest capacity from April to July 1944, during the massacre of Hungary's Jews. Hungary was an ally of Germany during the war, but it had resisted turning over its Jews until Germany invaded that March.[178] A rail spur leading to crematoria II and III in Auschwitz II was completed that May, and a new ramp was built between sectors BI and BII to deliver the victims closer to the gas chambers.[179] On 29 April the first 1,800 Hungarian Jews arrived at the camp;[179] from 14 May until early July 1944, 437,000 Hungarian Jews, half the pre-war population, were deported to Auschwitz, at a rate of 12,000 a day for a considerable part of that period.[105] The crematoria had to be overhauled. Crematoria II and III were given new elevators leading from the stoves to the gas chambers, new grates were fitted, and several of the dressing rooms and gas chambers were painted. Cremation pits were dug behind crematorium V.[179] The last mass transports to arrive in Auschwitz were 60,000–70,000 Jews from the Łódź Ghetto, some 2,000 from Theresienstadt, and 8,000 from Slovakia.[167][180] The last selection took place on 30 October 1944.[163] Crematorium IV was demolished after the Sonderkommando revolt on 7 October 1944. The SS blew up crematorium V on 14 January 1945, and crematoria II and III on 20 January.[181]
Same edition as the one I have read from my local library. This appears to be as fine an edition as you can get, and I have done a fair amount of research on that. This, the "definitive edition" has a lot of material that did not appear in the original one that was edited by Anne's father after the war. It also is on superior paper, with very readable type, and the photos are clearly rendered, compared to the other editions I have had in hand.
The two largest groups of prisoners in the camps, both numbering in the millions, were the Polish Jews and the Soviet prisoners of war (POWs) held without trial or judicial process. There were also large numbers of Romani people, ethnic Poles, Serbs, political prisoners, homosexuals, people with disabilities, Jehovah's Witnesses, Catholic clergy, Eastern European intellectuals and others (including common criminals, as the Nazis declared). In addition, a small number of Western Allied aviators were sent to concentration camps as punishment for spying.[28] Western Allied POWs who were Jews, or who were suspected of being Jews by the Nazis, were usually sent to ordinary POW camps; however, a small number of them were sent to concentration camps because of antisemitic policies.[29]