If you just want some direction on how to get bigger read some of the stickied threads on here or any of the "how do you train threads" you'll prob get more usefull information out of that than a book.
When an author writes a book they try and bring a heap of "new" concepts or at least a unique view that will set them apart and sell copies. That is well and good but a lot of the most important info is not new or unique. Those threads are full of tried and tested tips that have produced the best gains in the long run.
If you want to learn more about muscles and the process of hypertrophy do as X said. If you aren't that interested in the science though a good more basic book is strength training anatomy (I think thats what its called)