Contact
The easiest by email:

Thomas "add" drehleier-unterricht "dot" de

(The email address is listed in this form in order to protect the mailbox from unwanted spam. Unfortunately, there are programs scanning the web pages for valid e-mail addresses and then flooding it.)

 

Snail Mail:
Thomas Blau
Werner-Bockelmann-Str. 59
65934 Frankfurt am Main