From the "About the Author" secton in Mind Out of TIme:

Christopher Stasheff (1944 - 2018) spent his early childhood in Mount Vernon, New York, but spent the rest of his formative years in Ann Arbor, Michigan.  He always had difficulty distinguishing fantasy from reality and has tried to compromise by teaching college.  When teaching proved too real, he gave it up in favor of writing full time.  He wrote novels because it was the only way he could be the director, the designer, and all the actors too.  He tended to prescript his life, but couldn't understand why other people never get their lines right.  This caused a fair amount of misunderstanding with his wife and four children.  He seeks refuge in fantasy worlds of his own making, and hopes you enjoy them as much as he does.

Christopher died in 2018 from Parkinson's Disease.  He will be remembered by his friends, family, fans, and students for his kind and gentle nature, willingness to guide and mentor any who asked, and for his witty sense of humor.  His terrible puns, however, will be forgotten as soon as humanly possible.