Can I Read That?

I was sitting on the subway on my way to work this morning, listening to my iPod and reading as usual. I like to balance my iPod, purse, book, mug-o-coffee, and sometimes other odds and ends all on my lap. It's a talent I'm perfecting. Anyway...a nice lady sat down next to me, balancing her backpack on her lap and started writing in her journal.

After a while I noticed that she had stopped writing and was reading my book along with me. I actually don't mind people reading "over my shoulder" so to speak. After about five pages and getting close to my stop to get off, I took off my earphones and let her see the cover. She was all smiles, wrote down the title in her journal, said, "Thank you, I'll have to read that book". That kind of made my day.

In case you're curious, the book was The Curious Incident of the Dog in the Night-time and I had just started reading it this morning.

Question: Where do you get ideas of books you want to read?