Sylvia Engdahl: 16 books

Book One: Stewards of the Flame When burned-out starship captain Jesse Sanders is seized by a dictatorial medical regime and detained on the colony planet Undine, he has no idea that he is about to be plunged into a bewildering new life that will involve ordeals and joys beyond anything he has ever...

Melinda Ashley has a plan for her life, and a trip to Mars isn't part of it. When she receives a spaceliner ticket as a high school graduation gift from her dad, she is dismayed, but reluctantly agrees to go with him--in part because she's infuriated by her fiance's high-handed declaration that she...