Eclectic would be the term to describe my library.
Historical fiction, from Robert Graves "I Claudius" and "Claudius the God" to the Patrick O'Brien Audrey and Maturin series, and a few others.
Sci Fi: Asimov, Frank Herbert et al.
Erotica: My erotic library deserves a grant from the NEA: Sade, Reage, the complete Gor series (It took me more than 10 years to assemble the lot) Some of Hemmingson's title, The Venus in furs, The She Devils (By Pierre Louys)
Philosophy: Rand
History: Too much to mention. Churchill: The history of the 2nd world war, The river war and My early life.
Guns Germs and Steel. Many histories of the 2nd world war, mostly personal accounts but also military histories of selected battles and campaigns.
Novels: Of all kinds. Some classics I like to reread often: Tale of two cities, Moby Dick.
A classic that could be classified as erotica: The complete arabian nights by Richard Burton Hard to read the 18th century English but instructive.

In French; Les Miserables, Jean de Florette, Manon des sources, La gloire de mon Pere and Le chateau de ma mere.

Why: I have a wide range of interests, and once I get an interest for something, I read a lot on it until I get bored, then I move on to something else.