As a mildly reformed book collector (modern firsts, thank you very much), I loved this obituary in today's New York Times. Helmut N. Friedlaend was a monumental book collector of incunabula — European books printed before 1501. I have never heard nor read the word "incunabula" before. I am not even sure how to pronounce it.
The best part of Mr. Friedlaend's collection, is that at a certain point he sold it all. But have no fear, he never gave up on book collecting. Towards the end of his life, he was collecting Baedeker travel books.