This image is the cover for the book Ham Sandwich, Classics To Go

Ham Sandwich, Classics To Go

(Excerpt): "In addition, Perrie and Dexter were volunteers for what Dr. Aloys Ormond referred to cryptically as "very advanced experimentation." The group at large had not been told the exact nature of these experiments, but the implication was that they were mental exercises of such power that Dr. Al did not wish other advanced students to try them, until the brave pioneer work being done by Perrie and Dexter was concluded and he had evaluated the results."

James H. Schmitz

James Henry Schmitz (October 15, 1911 – April 18, 1981) was an American science fiction writer born in Hamburg, Germany of American parents. Schmitz wrote mostly short stories, which sold chiefly to Galaxy Science Fiction and Astounding Science-Fiction (which later became Analog Science Fiction and Fact). Gale Biography in Context called him "a craftsman-like writer who was a steady contributor to science fiction magazines for over 20 years." (Wikipedia)