Green Library, you could always move on to the Marabout Junior series, which featured adventurer Bob Morane.
Bob Morane was a former RAF pilot who worked as a reporter and freelance adventurer, often accepting secret-agent or detective assignments. In later volumes he worked for the Time Patrol, going back to dinosaur times or fighting androids in outer space.
There weren't a lot of illustrations, but those the books had displayed Bob with a massive chest, usually when one of the bad guys (such as Ming "The Yellow Shadow") had him strung up for weird torture.
Bob's best buddy, a Scotch bodybuilder usually traveled with him to provide the gay subtexts, and get strung up for a series of "my hero!" rescues.
Belgian author Henri Vernes published 12 volumes of Bob Morane's adventures (1958-67). Most have been translated into English. There have also been over 100 bandes-dessinee (which I haven't read), a 1964-5 tv series (with Claude Titre as Bob Morane and Billy Kearns as Bob Ballantine), a 1998 animated series, and some tie-in video games and toys.