Thank You! I find myself in the exact same category as the poster, I'm in high school, and have trouble with all this calculous. I looked at Discrete Mathematics, and it's perfect, designed for an introductory book. I'm just finishing up Knuth's The Art of Computer Programming, and once I read Discrete Mathematics I'll go back and reread Knuth's books; mabey I'll finally understand the math sections! Again, thanks.