Expanded and updated, this text continues to build upon the foundations of real analysis to present novel applications to ordinary and partial differential equations, elliptic boundary value problems on the disc, and multivariable analysis. These qualities, along with more figures, streamlined proofs, and revamped exercises make this an even more vital text than the popular first edition.
Krantz said he purposely made the book '[as hard as real analysis was years or decades ago,]' and it is at least twice the size of my other Real Analysis book, but Krantz's is not impossible if one studies & focuses: I even got a B+ and B in parts 1 and 2 of 3 of a class that uses it, though I needed a B+ to continue.