TITLE: Good book for logic self-study with answers to exercises
QUESTION [5 upvotes]: I know a similar question has already been asked, but can anyone suggest a good book on mathematical logic that includes answers to exercises? I am looking for something that is conducive to self-study and knowing if I'm right or wrong with the exercises is very important to me. Thanks for any input.

REPLY [4 votes]: A Friendly Introduction to Mathematical Logic 2nd Edition by Christopher C. Leary and Lars Kristiansen meets all your criteria.
The authors have made it freely available here: https://minerva.geneseo.edu/a-friendly-introduction-to-mathematical-logic/.