I think Mathematics for Computer Science Eric Lehman and Tom Leighton (http://www.cs.princeton.edu/courses/archive/spr10/cos433/mathcs.pdf http://www.cs.princet

I think Mathematics for Computer Science Eric Lehman and Tom Leighton (http://www.cs.princeton.edu/courses/archive/spr10/cos433/mathcs.pdf http://www.cs.princeton.edu/courses/archive/spr10/cos433/mat...) is a great resource. It has the best explanation of induction I have seen - discrete maths books are normally completely awful in this regard. Use something lke Khan Academy to fill in the blanks.