Robert A. Heinlein
Before the genre of Young Adult existed we had juveniles. Heinlein’s juveniles are an a class by themselves. Designed for younger readers, they feature teens who are faced with problems they have to solve for themselves. That doesn’t mean they can’t be read and enjoyed by adults, too.
I first started reading Heinlein as an adolescent, and I still enjoy reading him. He never talked down to his readers and the problems they faced are a challenge to adults, too.
This story has a little too much hard science in it to be one of my favorites. How a torch ship is powered, how faster-than-light travel works, for example, arnn’t deeply interesting to me. More interesting is the situation of one twin who is cheated out of an opportunity to travel to the stars by his manipulative twin. When his twin Pat is injured in a skiing accident, Tom suddenly has the chance of a lifetime.
This book lacks the humor of Star Beast and the social commentary of Citizen of the Galaxy, but it’s still a good read.