I'm submitting this beautiful book right now because the American Mathematical Society (AMS) is having a large sale, it's 40% off until the 17th. (You have to make an AMS account).
Table of contents (pdf): https://bookstore.ams.org/mbk-105/~~FreeAttachments/mbk-105-...
Sample Chapter (pdf): https://bookstore.ams.org/mbk-105/~~FreeAttachments/mbk-105-...