Classicly

Danger in Deep Space is a science fiction space opera written by Carey Rockwell, a pseudonym used by Grosset & Dunlap. It is unknown who wrote the books, or even if there was only one writer. 

The year is 2353. Tom Corbett is a cadet with the Space Academy, training to become a member of the elite Solar Guard. Sent on a top-secret mission across the stars, Tom and his fellow crew members discover the nature of true loyalty, as they battle against danger in deep space.