I really like this book. It goes through all the essential chords and all the soloing possiblities. There is also a great section in the book where he has a great method in intervalls. The method do so you always know witch intervarls it is between any two note. A big problem for a lot off players is that they here melodies in the head but can`t play them on the instrument, this book solves this problem with a little study. The book includes an cd, with examples for all the chord types so you can practise every section, and then connect all the sections so you can train everything you have learned. I really recommend this book. I think this book solves the improvisations problems that a lot of players suffers for. At the end of the book there is also a great theory summary.