The Weapon Shops of Isher is a science fiction novel by Canadian writer A. E. van Vogt, first published in 1951. The novel is a fix-up created from three previously published short stories about the Weapon Shops and Isher civilization: "The Seesaw" (Analog Science Fiction and Fact, July 1941) "The Weapon Shop" (Analog Science Fiction and Fact, December 1942) "The Weapon Shops of Isher" (Wonder Stories, February 1949) Source: Wikipedia (en)