The book only contains about 35 pages of large type text, so don't expect much detail. The 5 or so pages on playing are really basic, only helpful to someone who knows absolutely zero about flute playing. The book only gives exact mathematical dimensions for making a pvc flute in G, which you can find at the author's website (www.markshep.com/flute). All other flute dimensions are given as 'about' & 'generally'. Nonetheless, the book provides a foundation for someone with a trained ear to be able to start making simple flutes, refining thier skills through trial & error. Overall the information in the book is more than worth the price. As a half hour read it is well worth reading by everyone interested in making, playing or listening to flutes. The knowledge gained versus the money & time invested ends up being a real bargain. The book also provides resources on where to go for more and more detailed information.