TITLE: Visual book of real analysis
QUESTION [10 upvotes]: Can anyone suggest a book that a lot of visualization into real analysis, like the book Proof Without Words by Nelsen.

REPLY [2 votes]: I really like James Callahan's Advanced Calculus: A Geometric View. Only after reading this book did I really understand what was going on with the change of variables formula when doing integration. There are many nuggets of intuition in this book, and they are explained with plenty of diagrams. Also, consider it to be a supplementary textbook for whichever main book you might be using to learn real analysis.