Avallone follows the series' premise fairly well, although it was likely penned early in the show's run, maybe even before it ever aired. As in early episodes, Illya is merely a supporting player stuck in the laboratory, although he does get to join Solo for the action climax. It took a few episodes for the show's producers to catch up to the massive popularity of Illya and actor McCallum, primarily among young women.
Solo goes to Paris and Germany to investigate the strange death of an U.N.C.L.E. agent who was found dressed with his clothing backward. Somehow, the murder is tied into a THRUSH operation that uses ultrasonic sound waves to turn people into mush. Avallone's choice as villain is intriguing and certainly more daring than any seen on television. Golgotha is a hideously deformed madman dressed in a hooded cloak who leaves all he faces queasy at the sight of him. Since Avallone never wrote another U.N.C.L.E. novel, Golgotha probably never returned to battle Solo and Kuryakin, but he's effective in this adventure, which evokes the horror of Dachau death camps.