Math Books for CS Undergrads

Ok, basically the situation is like this: I am one of the millions of students that hated mathematics to death while in high school but want to study computer science. As a result of this passionate hate I now find myself in university and although I can deal with the math of the course I really want to get a better understanding of most of the concepts and ideas in discrete mathematics, linear agebra, number theory, etc. However, it sounds ineffective that I just pick a subject, go to wikipedia, read about that, pick another subject, do the same, and so on. So, what I am asking is suggestions for books covering the concepts that a person who wants to understand maths better needs to be ok with.