This book, consisting of the two novels Defender of the Flame and Herald of the Flame, is the story of the long and momentous life of one man and the strange turns of fate that take him from his planned career as an ordinary starship pilot to acclaim as a legendary hero and ultimately to a destiny far beyond anything he or his contemporaries could have imagined.

An omnibus edition containing the complete trilogy This Star Shall Abide (known in the UK as Heritage of the Star), Beyond the Tomorrow Mountains, and The Doors of the Universe. Noren can see that his world is not as it should be--it is wrong that only the Scholars, and their representatives the Technicians, can use metal tools and Machines. It's wrong that only those few have access to the impenetrable City, which he has always longed to enter. Above all, it is wrong for the Scholars to have sole power over the distribution of knowledge. Unable to believe in the Prophecy that promises these restrictions will someday end, he declares it to be a fraud and defies the High Lew under which they are enforced. His family and the girl to whom he is betrothed reject him. Yet he cannot turn back from the path that leads him to the mysterious fate awaiting heretics. But the more he learns of the grim truth about his people's deprivations, the less possible it seems that their world can be changed. And once he discovers what really happened in their past, he becomes convinced that it is up to him to restore their rightful heritage. To do so, however, will mean giving up all else that matters to him, for it will demand more drastic steps than anyone has imagined.

Starship pilot Terry Radnor is elated to be among those chosen to defend the secret colony Maclairn against enemies who pose a threat to the spread of paranormal human mind powers. He commits himself wholly to the goal of that world, not guessing how far his effort to protect it will take him from everything else he cares about--his promising career as a Fleet officer, contact with people who share his newly-discovered psi capability, his wife and unborn child. Torn away against his will after learning a secret too deep for its disclosure to be risked, he is forced into exile from all that has previously mattered to him, and must build a perilous new life far from Maclairn, grounded without hope of fulfilling his earlier pledge. Yet a mysterious and extraordinary destiny has been predicted for Terry, and against all odds fate puts him in place to confront the colony’s greatest peril.

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.

Three hundred people, isolated on a raw new planet in the 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. If they don't lose heart in the face of hardships beyond any they imagined. And if their kids can be reared to believe in the dream and and advance both their technology and their psi powers from one generation to the next. Starship Captain Jesse Sanders hasn't expected to be responsible for the settlement. Peter is the leader, the visionary on whose inspiration they all depend. But Peter has his hands full, not only with maintaining morale but with grueling ordeals of his own. So the job of ensuring the colony's survival falls on Jesse. And in the end, he must stake his life in a desperate attempt to prevent the loss of all they have gained. This is a sequel to "Stewards of the Flame," but it can be read independently. Unlike Engdahl's other earlier novels, it is not a YA book and is not appropriate for middle-school readers.

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 can't. Her outlook begins to change when she meets Alex Preston, a second-generation Martian colonist who is going home after college on Earth. Alex believes settling Mars is important. He's looking forward to the role he expects to play in the colony's future. Melinda finds this hard to understand, yet she is more and more drawn to him and, while on Mars, to his family. Torn between what she has always wanted and upsetting new feelings, she wonders if she can ever again be content. It takes tragedy and a terrifying experience on the Martian moon Phobos to make her aware of what really matters to her.

With genetic engineering promising salvation for the people on their hostile planet, the Scholar Noren finds he faces more problems than overcoming the taboo on genetic research.

Rediscover this beloved Newbery Honor-winning classic, Featuring a brand-new cover and a foreword by Lois Lowry! Elana, a member of an interstellar civilization on a mission to a medieval planet, becomes the key to a dangerous plan to turn back an invasion. How can she help the Andrecians, who still believe in magic and superstition, without revealing her own alien powers? At the same time, Georyn, the son of an Andrecian woodcutter, knows only that there is a dragon in the enchanted forest, and he must defeat it. He sees Elana as the Enchantress from the Stars who has come to test him, to prove he is worthy. One of the few science fiction books to win a Newbery Honor, this novel continues to enthrall readers of all ages. Critical acclaim for Enchantress from the Stars: A Newbery Honor Book A Junior Library Guild selection An ALA Notable pick Winner of the Phoenix Award Finalist for the Book Sense Book of the Year Award

As captain of his own starship Estel, Terry Steward, born Terry Radnor, is committed to spreading acceptance of psi powers and other advanced mind capabilities throughout the colonies of humankind. Barred from contact with his beloved planet Maclairn, he now journeys from world to world, heralding the hopeful future about which he alone knows the full truth. But the opponents of mind-powers are gaining strength, and on Earth the persecution of people who develop such abilities is increasing. Soon targeted by bounty hunters, Terry risks everything that matters to him in a desperate attempt to defeat Maclairn's enemies, not guessing that if he lives long enough, he is destined for an even greater role in human history than he has played as a defender of its cause.

Ardith Moran is elated by the prospect of contact with extraterrestrial civilizations, elated enough to stake her life on her conviction that they exist after the exploratory expedition's leaders turn back. The last thing she expects is to fall in love with an alien, much less for their love to play a key role in saving Earth from tyranny and eventual ruin. As a member of the Anthropological Service, he is willing to make sacrifices and expects her to do the same. Can she, influenced by the legacy of the now-legendary Captain of Estel, convince Earthborn people that they can't retreat from the universe? Or will Earth's authorities succeed in killing her to suppress the evidence only she and her fellow envoys can provide? Please note: The original edition of this book published in June 2021, which has a woman's face on the cover, has been withdrawn. This is a revised edition published in September 2022.