New personal book on a shakuhachi journey

A new book about a shakuhachi learning journey has been published.
It is written by Bob Berlin-Grous between 1974 and 1980. It is not only a narrative - but also throughly researched writing on shakuhachi and the culture surrounding it.

I haven't read it yet.... but it sounds really interesting, so I thought I wanted to tell you about it.
Does any of you know Bob Berlin-Grous?

Here is the link: http://shakuhachi.com/PG-Grous-SB.html