Great book, though it covers a somewhat different subset of topics than those typically considered "discrete mathematics"... http://www.mhhe.com/math/advmath/r

Great book, though it covers a somewhat different subset of topics than those typically considered "discrete mathematics"... http://www.mhhe.com/math/advmath/rosen/ http://www.mhhe.com/math/advmath/rosen/ ..is what we used in college; I found it hard to read in spots, but haven't really found anything overall better.