The Thunder Omen — Caroline Lawrence

Threptus the former beggar boy has teamed up with Floridius, a soothsayer and seller of sacred chickens. Together they earn a living helping people solve problems and mysteries.

In this third book of the series, it is the time of Saturnalia - when all the rules are turned upside down and chaos ensues. Threptus is enjoying the mayhem but the thunder omens are disturbing. Can Threptus help his friend matchmake and avoid the disaster threatened by the thunder omen?