TITLE: A good introductory discrete mathematics book.
QUESTION [9 upvotes]: I am professor of mathematics and I am scheduled to teach a newly designated discrete math class for computer science majors.  The prerequisite for the class is only Calc 1 and Id like a book that isnt too expensive, has a chapter on logic and proofs, and isnt too difficult but addresses some modern concepts.
Any suggestions?
If I can get a book that addresses all of these criteria except price, then that would work too.

REPLY [2 votes]: I am in a similar boat, with a couple of differences.  First, I've taught the course previously, but am looking for a free alternative to the rather expensive text I've used in the past. Second, our course requires only pre-Calc, and will have a mix of Math & CIS students so the math abilities will vary.  I have perused free texts by Finan as well of those by Chen and Lovasz posted in this thread.  Right now I am leaning toward Chen, which has a nice selection of topics from which to choose or omit as you see fit.  A clearing house of free texts is here.  Best of luck.