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Boundary is a 3-book series with 2 primary works first released in 2006 with contributions by Eric Flint and Ryk E. Spoor.
2006 • 6 Readers • 457 pages • 4.5
Skyspark
2013 • 1 Reader • 3
Castaway Odyssey
2016 • 3 Readers • 3.5
2 Readers • 3