Evelyn E. Smith 
Once A Greech [EPUB ebook] 

Discovering intelligent life was the last thing Fleet Captain Iversen wanted to happen to his watch. Especially when the ship in question was commanded by his absolute worst officer. And yet, here he was.
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.