The Eschaton Companion is a collection of resources to help readers of John C Wright's Count to the Eschaton Sequence keep track of all the characters, factions, races, worlds, and star-spanning-intelligences that are woven into the spacetime-spanning plot.

The Companion attempts to avoid explicit spoilers, but contains enough detailed information from the Sequence novels and appendices that the resolution of many plot points may be implicitly revealed. It is recommended that you refer to the Companion sparingly to keep the many names straight until you've finished the Sequence for the first time.