Ad Stellae Books is a personal imprint used by Sylvia Engdahl on both print and ebook editions of her novels for adults, plus indie reissues of her traditionally-published Young Adult novels. In addition, it is used on the ebook editions of traditionally-pubished YA books by her mother, Mildred Allen Butler.
Starship pilot Terry Radnor, chosen to defend the colony Maclairn after training gives him extraordinary mind powers, finds fulfillment in love and in commitment to a cause--until he is torn away agaist his will upon learning a secret too deep for its disclosure to be risked. Yet though he must build a new life far from Maclairn, fate puts him in place to confront the colony's greatest peril..
Omnibus edition of the trilogy This Star Shall Abide (aka Heritage of the Star), Beyond the Tomorrow Mountains, and The Doors of the Universe. Noren is a heretic—he defies his world’s High Law and has no faith in the Prophecy's fulfillment. But the more he learns of the grim truth about his people's deprivations, the less possible it seems that their rightful heritage can ever be restored.
When starship captain Jesse Sanders is detained by a dictatorial medical regime on the colony planet Undine, he is plunged into a life involving ordeals and joys unlike anything he has ever imagined. This controversial novel deals with the so-called paranormal powers of the human mind and appeals to a wide range of readers who question the dominant medical philosophy of today's society.
Isolated by choice on a raw new planet, 300 people hope that their psi powers will become the foundation of a culture that can someday shape the future of humankind. If they don’t starve first or lose heart in the face of hardships beyond any they imagined. Events force starship captain Jesse Sanders to take charge of ensuring the colony’s survival--ultimately at the possible cost of his life.