I have written reviews about this series of books before. These books are a great idea to keep around for gigs and to have laying around in the studio. The are small books 3 0r 4 inches by 5 inches. Don't let the small size fool you, Paul White stuffed these books full of good, useful, easy to read material. Now, I will say that there are books on these subjects that may contain more material, but these books are made for on the go. I keep several of these books with me where ever I am playing or recording. This set of books is even an added bonus. Seperately these books are $7.95, but that are sold together here in a pact for even more of a discount. Also because of the price, I don't mind carrying these books with me because if I lose one at a gig I know it won't cost me an arm and a leg to replace it. Bottom line is that these books make great on the go reference material that can't be beat for the price.