The Acid-alkaline Food Guide by Larry Trivieri Jr., Susan Brown (2006, Paperback)

I've read several books regarding acid-alkaline, including the "pH Miracle". I enjoyed that book, too, but this book is a little more moderate (it encourages whole fruits) and doesn't make any questionable claims (which pH Miracle does). It's small, easily digested, with a nice guide on specific food acid-alkaline values in the 2nd half of the book.