Jerry Ahern was known mainly for his post-apocalyptic series like The Survivalist and The Takers. I haven't read any of those, but I read one of the books in his other series, about the one-eyed mercenary Hank Frost, written as by Axel Kilgore. I'd read one before, called The Terror Contract (1982). It wasn't bad, straight-up action that has no pretenses of literary merit. Even the gun porn that you hear Ahern having been guilty of is minimal.
The other Hank Frost I recently read, called Death Lust (also 1982; Cosa Nostra! in Finnish), wasn't as good, though it had its moments. There's even a hint of great adventure in the air, when Hank Frost is posing as a gun dealer somewhere in the Mediterranean, and when the ship he's travelling in gets attacked, he saves a young woman and when it's revealed she's the daughter of a Mafia don, he wins the father's ever-lasting gratitude. The Mafia helps Hank Frost attacking the gun dealers led by Frost's long-time enemy, Eva Chapmann, whose father he's killed in the past. There are lots of attacks and battles in the book, and I got actually kind of lost amongst them, but all in all this was a pretty entertaining men's adventure paperback. The end in which Eva Chapmann is dressed as a nun, was a bit weird, though.