Discover magazine posts their list of the 25 Greatest Science Books of All-Time. Happily Darwin takes the top 2 positions, with Newton's Principia coming third. Which was a bit of a surprise to me. I would have bet on Newton over Darwin for #1, and the inclusion of Beagle on the list at all would have seemed a long shot. I have a lot of reading to do. von Humbolt's Cosmos should be there, as should Wallace's The Malay Archipelago. Also, Systema Naturae by Linnaeus, whose system of species classification still frames modern biology.