I came across this book when I was staying at an AirBnB in Salzburg, Austria and was taken in by it's diverse, non-traditional approach to rhythm.  The stylistic focus of the book is heavily weighted toward jazz but there was some effort to have it appeal to a wider audience.  Although the author is a percussionist the initial focus is on loosening up exercises and scat singing in a format that does not require the reader to be able to read traditional rhythmic notation.  From page 30 to 46 the author describes his notational convententions and after that introduces a series of exercises using notation that are intended to augment the description.  My assumption is that they are supposed to be both sung and played but most consist of single line patterns in jazz and pop styles, later shifting to non standard meters and polyrhythms.   The last part of the book and the part that attracted me to the book initially is a collection of percussion ensemble exercises using claves, cowbells, cabaza, congas, agogo bells, and other assorted percussion instruments.  The book is written in German and English and I found it to be somewhat difficult to follow the authors intentions.  If you already have a reasonable foundation in rhythmic practices and percussion techniques, you have a strong interest in rhythmic applications for jazz music, or you have an interest in some alternative notational methodologies then you might find the book to be of some value but if you are looking for a method to use to learn fundamental rhythmic techniques I would not recommend using this book except with your teacher at his or her request.

Greg Shoemaker (2020)