An unholy attack upon his brother-in-law General Arisaydia pitches sorcerer Learned Penric and his Temple demon Desdemona headlong into the snake-pit of Cedonian imperial politics. But they will not travel alone. The mission from his god brings Penric some of his strangest new allies yet, and the return of some of his most valued old ones.

This novel-length story takes place two years after the events of "The Physicians of Vilnoc".

The internal chronological order of the Penric & Desdemona tales is presently:

"Penric's Demon"
"Penric and the Shaman"
"Penric's Fox"
"Masquerade in Lodi"
"Penric's Mission"
"Mira's Last Dance"
"The Prisoner of Limnos"
"The Orphans of Raspay"
"The Physicians of Vilnoc"
The Assassins of Thasalon

"Demon", "Shaman", and "Fox" are collected in the paper volume Penric's Progress, and "Mission", "Mira" and "Limnos" are collected in the paper volume Penric's Travels.