Look into Mathematics: A Discrete Introduction, by Ed SCheinerman. That was the first discrete book I read. While it's easy, you can also learn a lot from it.
This is my signature. There are many like it, but this one is mine. My signature is my best friend. It is my life. I must master it as I must master my life. My signature, without me, is useless. Without my signature, I am useless.
