'Await Your Reply' by Dan Chaon. I've always been obsessed with the idea of disappearing and becoming someone else. Even if you don't share that obsession, I can't recommend this book highly enough.

If you're trying to hide, avoid using your own name. Have a couple spares that you can pull out of your pocket anytime, the more thoroughly documented the better.

Hair color is the easiest way to change your appearance, but a bad dye job might draw more attention to you.

People will always challenge you on an idea as long as it has not been concretized by somebody else.

We're all amateur investigators. We scan bookshelves, we ogle trinkets left out in the open, we calculate the cost of furniture and study the photographs on display; sometimes we even check out the medicine cabinet.

You can read Kant by yourself, if you wanted to; but you must share a joke with someone else.