'Melissande and co. are shocked to receive a visit from a Monk Markham who comes from an alternate version of their own world.
The second Monk has created a portal that allows travel between realities, and he's come to them for help. The Gerald in his world has turned into a raving tyrannical despot as a result of actions taken during their version of the Kallarapi crisis. Monk 2 is convinced the only person who can stop Gerald ... is Gerald. But Gerald's disappeared!' (From the publisher's website.)
Epigraph: Parallel worlds, Gerald. Alternate realities. They've got to exist, right? I mean, they've got to be within the bounds of thaumaturgical possibility. Haven't they? At the end of the day, aren't they just one more metaphysical dimension? I'll bet they are, you know. And I'll bet it would be brilliant to actually go visit one. Don't you think?
-Professor Monk Markham, Member of the Masterful Company of Wizards.