Piano Handbook

[allthumbs]

Greetings


I did a search and found three references, mainly from beginners, to the following;

The Piano Handbook: A Complete Guide for Mastering Piano by Carl Humphries

Does anyone else, (especially teachers), have this resource or know anything about it. Is it useful as a teaching aid?
From the responses given in the search, the beginners found it useful.

Have a look and tell me what you think.

https://www.amazon.com/gp/product/0879307277/102-2089158-3970568?v=glance&n=283155&%5Fencoding=UTF8&v=glance

Thx

allthumbs