Ryder Hook Series

Another popular series of books by Ken, next to the Kregen series, is the Hook series. There are altogether 10 books in this seres.

As far as I know, all of them were written under the pen-name Tully Zetford.
At least, this is what the Bulmer @ Wikipedia says. I distinctly remember having purchased all the Hook books in germany and the author's name was printed "Kenneth Bulmer". But this might only apply to the german editions, I dunno. I've never seen the english books.

Below are the english and german titles of all the Hook books:

The first four volumes were not published in Germany as separate books, but only as a collection, under the title "Der Nova- Mann".