This omnibus collects all twelve serialized installments of At Calendar's End into a single volume.

Time is a fickle thing. Sometimes, so are those that wield it. As the holidays set in and another year comes to a close, the Intercalary – beings charged with keeping the cycle of time moving forward – prepare for another year. For them, it's nothing new. One more year in a timeless cycle, except things are already shaping up to be different for them this time around...
A shadow haunts the Intercalary. A darkness that threatens to engulf them, revisiting the sins of time long forgotten. With their own lives in danger, humanity's own existence now also hangs in the balance...