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Boundary
Series · 6 books · 2006-2020

Books in series

Boundary book cover
#1

Boundary

2006

Searching for the truth behind an oddly shaped fossil discovered in the Arizona desert that could hold the key to the great extinction at the KT boundary, Dr. Helen Sutter never realized that her quest would take her all the way to the planet Mars.
Threshold book cover
#2

Threshold

2010

The Sequel to Boundary . Space Adventure by a New York Times Best-Selling Author and a New Star of Science Fiction. When the strange fossil she'd discovered had ended up giving her a trip to Mars, Helen Sutter thought she'd gone about as far as any paleontologist would ever go in her lifetime. But when you've also married A.J. Baker, overconfident super- sensor expert for the only private agency in space – the Ares Corporation—and your best friend Madeline Fathom Buckley is a former secret agent who's just signed on as the chief of security for the newly created and already embattled Interplanetary Research Institute of the United Nations, there's always somewhere farther to go. The newest discoveries will take her, A.J., and their friends Jackie, Joe, and Madeline to the mysterious asteroid Ceres – and beyond, in a desperate race to Jupiter's perilous miniature system of radiation- bombarded moons. The next gold rush is on – for alien technology, hidden in lost bases around the system. And there are people willing to do anything to get it – even plan the first interplanetary war, four hundred million miles from home!
Portal book cover
#3

Portal

2013

The sequel to Threshold, Book Three in the Boundary series. HELL FROZEN OVER Madeline Fathom had miraculously landed the crippled Nebula Storm on Europa. She joined on that frozen moon of Jupiter the stranded crewmembers of the ill-fated EU vessel Odin. The Nebula Storm's reactor was ruined in the landing, the Odin’s shuttle can’t make the trip back home, and the only vessel that could have make the journey to save them has just been destroyed by a renegade crewman, bad luck, and the remorseless forces of nature. But Madeline, Helen Sutter, A.J. Baker and the team have one card left to play. All they have to do... is survive lethal radiation, vacuum, and ice as hard as steel while they figure out how to make Nebula Storm fly again. But even as they prepare to make the journey home, Europa has one more discovery waiting for them... a discovery that might be the deadliest trap in the Solar System! Praise for previous books in this series: “. . . fast-paced sci-fi espionage thriller . . . light in tone and hard on science . . .” —Publishers Weekly on Boundary “The whole crew from Flint and Spoor's Boundary are back... Tensions run high throughout the Ceres mission . . . a fine choice for any collection.” —Publishers Weekly on Threshold “[P]aleontology, engineering, and space flight, puzzles in linguistics, biology, physics, and evolution further the story, as well as wacky humor, academic rivalries, and even some sweet romances.” —School Library Journal on Boundary
Castaway Planet book cover
#4

Castaway Planet

2015

NEW ENTRY IN THE NATIONALLY BEST-SELLING BOUNDARY SERIES. Stranded humans must adapt alien technology to survive on a dangerous planet. Lost in the dark, half a year into their journey to the colony world of Tantalus, Sakura Kimei, her family, and her best friend, the alien "Bemmie" nicknamed Whips, are torn from the safety of their colony ship. In a crippled lifeboat, they had one chance to find a habitable world. But even then, they would find that their apparent salvation was a world of a thousand secrets. Praise for previous books in this series: ". . . fast-paced sci-fi espionage thriller . . . light in tone and hard on science . . ." —Publishers Weekly on Boundary "The whole crew from Flint and Spoor's Boundary are back... Tensions run high throughout the Ceres mission . . . a fine choice for any collection." —Publishers Weekly on Threshold "[P]aleontology, engineering, and space flight, puzzles in linguistics, biology, physics, and evolution further the story, as well as wacky humor, academic rivalries, and even some sweet romances." —School Library Journal on Boundary
Castaway Odyssey book cover
#5

Castaway Odyssey

2016

#5 in the Boundary series universe, and sequel to Castaway Planet, by New York Times multiple best-selling author Eric Flint and veteran science fiction and fantasy author Ryk E. Spoor. Worst-Case Sergeant Samuel Morgan Campbell had been in plenty of tight spots before, but nothing like this. It had happened in a few terrifying the starship he and his crew travelled on, the Outward Initiative, shattered to pieces before their eyes and disappeared, leaving them stranded in the endless night of deep space on Lifeboat LS-88—all systems dead, light-years from any known colony. Somehow, Sergeant Campbell and his crew of half-trained children—ranging from freshly graduated Xander Bird down to eight-year-old Francisco—have to repair systems with no tools, navigate with no computers, and—if they could find a planet they could live on—land a shuttle whose controls were more than half-destroyed. And if they manage all of that, then the real challenge begins; the only planet in range has secrets that even Sergeant Campbell cannot imagine! Praise for previous books in this “. . . fast-paced sci-fi espionage thriller . . . light in tone and hard on science . . .” — Publishers Weekly on Boundary “The whole crew from Flint and Spoor's Boundary are back . . . Tensions run high throughout the Ceres mission . . . a fine choice for any collection.” — Publishers Weekly on Threshold “[P]aleontology, engineering, and space flight, puzzles in linguistics, biology, physics, and evolution further the story, as well as wacky humor, academic rivalries, and even some sweet romances.” — School Library Journal on Boundary
Castaway Resolution book cover
#6

Castaway Resolution

2020

NEW ENTRY IN THE BOUNDARY SERIES BY ERIC FLINT & RYK E. SPOOR Surviving crash-landings and monsters and island-eaters was only the beginning! The Kimei family and a second group of castaways, led by Sergeant Campbell, had finally joined forces after both had been forced to land on the bizarre planet Lincoln, whose continents were huge floating coral colonies, inhabited by even stranger lifeforms. They had survived crash-landings and venom-filled bites and disease, their own despair, and even the destruction—and consumption!—of one of their floating islands, and had learned to live, even prosper, in their strange new home. Far away, Lieutenat Susan Fisher slowly pieces together the mystery of what happened to the starship Outward Initiative . . . and begins to believe that—just possibly—some of the survivors might have escaped to a mysteriously unsuspected star system. But even her preparations and the resourcefulness of the castaways may not be enough . . . for Lincoln has far worse in store. At the publisher's request, this title is sold without DRM (Digital Rights Management). Praise for previous books in this series: “[F]ast-paced sci-fi espionage thriller . . . light in tone and hard on science . . .” —Publishers Weekly on Boundary “The whole crew from Flint and Spoor's Boundary are back... Tensions run high throughout the Ceres mission . . . a fine choice for any collection.” —Publishers Weekly on Threshold “[P]aleontology, engineering, and space flight, puzzles in linguistics, biology, physics, and evolution further the story, as well as wacky humor, academic rivalries, and even some sweet romances.” —School Library Journal on Boundary Eric Flint is a modern master of alternate history fiction, with three million books in print. He’s the author/creator of the multiple New York Times best-selling Ring of Fire series starting with first novel 1632. With David Drake he has written six popular novels in the “Belisarius” alternate Roman history series, and with David Weber collaborated on 1633 and 1634: The Baltic War and two novels in Webers Honorverse series. Flint was for many years a labor union activist. He lives near Chicago, Illinois. Ryk E. Spoor, while earning his master's degree in information science at the University of Pittsburgh, became a playtesting consultant and writer for the Wizards of the Coast, then merely a startup, now the leading publisher of role-playing games, Magic: The Gathering®, and related gaming materials. He now lives in East Greenbush, New York, working as Research and Development Coordinator for International Electronic Machines, and spends his non-writer time with his wife Kathleen, two sons, two daughters, a poodle, and a lot of chickens. Ryk is the coauthor with Eric Flint of five books in the Boundary science fiction series including Boundary, Threshold, Portal, Castaway Planet and Castaway Odyssey. His solo novels for Baen include Grand Central Arena, Spheres of Influence, Paradigms Lost, and Challenges of the Deep, as well as epic fantasies Phoenix Rising, Phoenix in Shadow, and Phoenix Ascendant.

Author

Eric Flint
Eric Flint
Author · 74 books
Eric Flint was a New York Times bestselling American author, editor, and e-publisher. The majority of his main works were alternate history science fiction, but he also wrote humorous fantasy adventures.
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