This appears to be a contract book where the publisher comes up with a title that will sell and then contracts someone to write the book. It is disorganized, and the different chapters vary greatly in quality. An entire chapter consist almost completely of text lifted out of FAA FARs and advisory circulars with no interpretation or commentary between listings. Some chapters are dedicated to discussing engine operation and electronics, but cover it in a more cursory manor than most private pilot study books. The chapter on electrical systems states several times that electrical systems travel at the speed of light in a wire when they travel closer to 2/3 of this speed. This is a nit, but goes to show how little effort was put into constructing this book. I found the book overall almost completely useless.