You will be getting good information on Hops, both varieties and flavor characteristics, and malts, their flavor and color contributions. Terry Foster does an excellent job of explaining the science behind ale brewing which is applicable to most styles of brewing.
I liked the historical information, the main reason for my rating, but was disappointed in the lack of brewing information. Maybe it will tell you enoough to get an idea of whether or not you actually want to brew Pale Ale but you won't learn the how part.
Any homebrewer that enjoys making and drinking pale ales needs this book. As an avid reader of the Classic Beer Styles Series, I feel that the author has taken some of the best aspects of the previous 15 books and combined it all into one, making this one of the most useful in the series. The second edition of the book is a tremendous improvement over the first. The book is longer than most of the others in the series, but only because the author broke the pale ale category into many subcategories. He does not discriminate - he explains all pretty much equally. The recipes are different and thoroughly presented; the method of dispensing each is even specified. All in all, a very useful reference for the homebrewer.
This book does give you a good historical lesson on Pale Ales. If you truly love Pale Ale, I do recommend this book; but it is quite factual and somewhat boring at times. As a homebrewer that brews extract beers, I was pleased that the book did offer extract recipes; however, the number of recipes was somewhat limited. I certainly do not mean any disrespect, but I was disappointed by the book's excessive use of exclamation marks. In my opinion, they give the book a sarcastic tone. However, if you enjoy Pale Ales as much as I do, relax, get this book, and have a homebrew.