Series:A Million Open Doors

John Barnes' A Million Open Doors series is not named/mentioned in the books as a series but is collected here into a series based on publisher statements on the book covers.
 * A Million Open Doors (1992)
 * Earth Made of Glass (1998) (The cover states “The sequel to the award-winning A Million Open Doors.”)
 * The Merchants of Souls (2001) (The cover states “The continuation of the interstellar epic begun in A Million Open Doors and Earth Made of Glass.”)
 * The Armies of Memory (2006) (The cover states “The Climatic Conclusion of the Epic Begun in A Million Open Doors.”)