Hitler was a major bibliophile. He had an enormous collection. “By 1930, as sales of Mein Kampf bolstered his income, book buying represented his third largest tax deduction (after general travel and transportation): 1,692 marks in 1930, with similar deductions in the two years following. More telling still is the five-year insurance policy Hitler took out in October of 1934, with the Gladbacher Fire Insurance Company, on his six-room apartment on the Prinzregentenplatz, in downtown Munich. In the letter of agreement accompanying the policy Hitler valued his book collection, said to consist of 6,000 volumes, at 150,000 marks—half the value of the entire policy. The other half represented his art holdings.”