Margaret St Clair 
Green Queen [EPUB ebook] 

Bonnar had created the Green Queen thoughtlessly — all part of a day’s work. But when his brain-child became a full-grown Frankenstein’s monster, embodied in the girl he loved, Bonnar was terrified. For now she threatened to shatter the whole carefully balanced social structure of Viridis — as well to undermine that radioactive world’s atomic shield!Only Bonnar could end the holocaust and turn the all-too-grim reality back to the illusion he had originally intended. But to do that he had to destroy the girl he loved — or be destroyed by her.