The Devil spawned them — and named them Dunlach
Author: Pulp Covers
Poisons Unknown
The Rim Of Space
Secret Agent of Terra
Vultures from the A-Power Orbit
A Swap For Sappho
Computer Swap
Knock Once To Swap
The Mate-Traders
Swap Captive
Swappers’ Rights
Swapping Tit For Tat
Love, Honor And Swap
The Fornication Formula
La Dolce Swap
Swingers On Board
The houseboat became a swap ship with these… Swingers On Board