The lesson of this book, for me, is there's always plenty more to learn. I've been playing blues bass for nearly two decades and there are still aspects of the blues language with which I am not familiar because I don't play much guitar. Having started on baritone 'ukulele just last year, I wanted to try to learn some of those aspects, and ran across this book. It is quite surprisingly thorough. The author starts with a wide variety of chord progressions -- much more than the standard I-IV-V7, 12-bar form -- some of which I'd learned by ear on bass from recordings, but had not thought much about in theoretical terms. For a blues book, this might seem to some as too expository about harmony, but I am interested in learning that. I've just gotten started and there's a lot left to learn. This is not for the novice uke-ist, but a great third or fourth book, which will have you strumming unusual chords, playing lead, and fingerpicking. If you play soprano, concert, or GCEA-tuned tenor 'ukulele, this book will give you no problems. As a baritonist, with a DGBE-tuned instrument, I must either follow the chord symbols and ignore both the notation and tabs, or follow the tabs and play in a different key (a fourth down). So far I've done a little of both. I would prefer to have a baritone edition of this book to keep working on note-reading, but there's probably not enough of a market for that. In short, I highly recommend this book/CD -- it has great exercises and explains the theory or thinking behind them; and it is chock full of things to work on. I bet it'll keep me plenty busy this summer.