Dillon Press
Dillon Press was a publishing company operating out of Minneapolis. 

They published one book related to Star Trek during their publishing history, in , Leonard Nimoy: A Star's Trek, a biography of the actor aimed at children in grades 3-6.

Dillon Press was founded by Uva Gilbert in the 1960s, specializing in books for upper elementary and junior high students as well as books of local interest. The company was bought by Macmillan Publishers in 1991 and closed shop in 2000. 
Publishers