TITLE: Textbook recommendations for undergraduate proof-writing class
QUESTION [31 upvotes]: I am teaching the proof-writing class (for the 3rd time) in the Fall and plan to buck the party line and use a different text than the default Bond and Keane.  My parameters are as follows:

Logic, Sets, Equivalence Relations and Induction should be covered.
Price should be reasonable (say around $30 or less).
Distractions like "historical comments" and "mathematical perspectives" should be kept to a minimum.

I plan to supplement such a book with "What is Mathematics" by Courant and Robbins.
I would be pleased to hear some recommendations!

REPLY [4 votes]: My father taught heat transfer in a mechanical engineering department and he had a great trick. Take a good text such as one suggested in another solution: 
http://www.pearsonhighered.com/educator/product/Mathematical-Proofs-A-Transition-to-Advanced-Mathematics/9780321390530.page
This book costs $100+
And then use an older edition for your class. You can buy the 1st edition of that textbook for $9 here:
http://a.co/1Qlm9sT