I was browsing images of a book about automobiles and on of the edition I found this ad on a book about television: https://i2.wp.com/www.thenookyamba.com/wp-content/uploads/2017/04/The-Nook-Yamba-Second-Hand-Books-80.jpg?fit=2304%2C3121&ssl=1
Did anybody seen that book?

No, never saw it before.

It was published in 1936. I found a pdf version posted by NJARC:
http://www.njarc.org/books/Electronic%20Television%20-%20Eckhardt%20-%201936/electronictelevi00eckhrich.pdf

It might be on www.worldradiohistory.com. Lots of vintage publications there.