Play-A-Long Book ONLY! Advanced. If you're ready for further challenges, try these slightly more difficult tunes in all 12 keys. Each tune begins with one chorus in the original key, and then moves through the other 11 keys. The tempos are moderate, but the real work-out begins when you start going through the various """"un-common"""" keys. This challenging set is for anyone ready to put themselves ""through the paces"" - the right way!