books.google.comhttp://books.google.com/books/about/Rings_of_continuous_functions.html?id=k4KnAAAAIAAJ&utm_source=gb-gplus-shareRings of continuous functions
A favorite in the library of topologists and analysts. The book starts with the title, i.e. none of the concepts in the title are defined, so if you don't understand those terms don't start with this book. Given that the reader is fairly familiar with the terms in title the book is a fairly pleasant read. Focuses mostly on spaces which are Tychonoff/completely regular. (Those continuous functions are into the reals.)