This looks like Walter Baumhofer‘s work, but I can’t verify that.
She became a prisoner in the savage Land of the Jaguar
Also featuring, Commie Castle of Torture, The Girl Who Has Sword To Kill Castro, and The Ever-Lovin’ Housewives of Pay for Passion Villa
via Edit: Added the April 1968 cover of Battle Cry, which reused the same artwork
Also featuring The Willing Witches Of Stud Island, Nude on Horseback, Forbidden House of the Golden-Legged Girls, Sex Investigators… How They Spy On You!, How and Where To Find Millions In Gold And Jewels, and 9 Sure Ways To Increase Your Sex Power
Holy crap! They should charge WAY more than 39¢ for this kind of information.
Also includes House Of Hungry Death: A Complete Novel Of Crime De Luxe