specifically a pure math book? I'm reading this textbook and sometimes it takes me so long to figure out what the theorem or something is actually saying. I can't tell whether parts of it are supposed or are conditions or if they're using some characteristic of another proven part of the concept. it's so annoying cause for about 12 pages i really liked this book due to its rigor now its rigor is killing me. its this one http://www.amazon.com/Methods-Mathematical-Physics-Cambridge-Library/dp/0521664020 if anyone knows a book like this, thats develops all the concepts from scratch, but is clearer I would very much like to know.