Ooh! I DID like that book.
And the Oxford Companion is fun to wander through.
Then again, I think reading the unabridged dictionary is fun. Through most of high school, my family didn't have one, and whenever my crowd got together at Wendy's house, I'd pull out her family's unabridged and plonk belly down on the floor and read. The rest of my friends would tease me about it, and ask if I was planning to read the phone book when I finished the dictionary.
When I was 17, I got my first unabridged all my own! And I can still sit and read it! It never gets old for me.
I'm geekier than you imagined, I s'pose.