TITLE: What are some good introductory books on mathematical proofs?
QUESTION [16 upvotes]: There was a time when I avoided math proofs, but now I am starting to enjoy them. I am taking Intro to Linear Algebra and am falling in love with proofs. Are there any introduction to mathematical proofs books that blow the others out of the water?

REPLY [3 votes]: A book used at my university in a first-year intro to mathematical thinking course is Tamara J. Lakin's The Tools of Mathematical Reasoning. It covers introductory logic, proofs, sets, functions, number theory, relations, finite and infinite sets, and the foundations of analysis. I liked it.