Evelyn E. Smith 
The Blue Tower [EPUB ebook] 

As the vastly advanced guardians of mankind, the Belphins knew how to make a lesson stick—but whom?
Evelyn E. Smith is best known as the author of the Miss Melville mysteries. From 1952 to 1969 she wrote dozens of science fiction and fantasy short stories that appeared in magazines such as The Magazine of Fantasy and Science Fiction, Galaxy, Super Science Fiction, and Fantastic Universe. Her stories were witty, well written, often humorous, and always unforgettable.