I've been reading runner's world for years now, and for the first time, they sent me a book to review. It's one of those deals where I get 21 days to decide if I want the book, if not I can send it back, if I do I can buy it for only $32.
I was blessed to receive. It's ok as a book but it's not great. It only took me 2 days to skim through and find all the sections that weren't already provided online or in the magazine.
I will not be buying the book for 2 reasons. First, they're selling it for twice as much as I could buy it from Amazon for. Second, it's not good. The book is slanted strongly towards women, but I would suggest The Complete Book of Running for Women, if you are a woman looking for this information.
If you are a beginner, I suggest checking out Runner's World Training. And the Couch to 5K program at Cool Running.
If you are looking for how to run farther better or your first marathon, I suggest
Marathon: You Can Do It! It's a great book that helped me get through my first marathon. I also own and have read the Lore of Running tome that Timothy Noakes wrote, but it's way too technical for most runners, including me. There's a lot of physics and biological information about how the body works in relation to running, but it's not a good book for motivation or for improving things really.
Other running books that I suggest.