For a person who likes reading and acquiring knowledge I don't own many books. (But everything I need to know I can access online.)
Most of my books are reference books. Here's the list in its entirety:-
The New International Webster's Dictionary of the English Language
The Twenty First Century Webster's International Encyclopedia
A Land of Gods & Giants (Photographs of Britain's Megalithic Monuments & Landscapes)
The Dictionary of British Place names
101 Essential Tips - Using the Internet
A Dictionary of Modern English Usage
The Concise Encyclopedia of World History
Hutchinson's Dictionary of Battles
Webster's World Factfinder
World Facts & Figures
Larousse Pocket Factfinder
A Guide to the East Midlands
A Modern Dictionary of Geography
Guide to North-East England
Purnell's Concise Encyclopedia of Geography
The Idler Book of Crap Towns II
Several collections of science fiction short stories.
Several poetry books.
* * * * * * * * * * *
Not a lot of variety there, I'm afraid; but I'm fascinated by lists and statistics.