Ninth Euclid's Prince

Welcome to New Rome!
The far-flung heirs of the empire have been called home to the capital of worlds. In these mean streets, no wife is above suspicion, and no man above assassination. With the Emperor poisoned and prince Oswald in jail, Ninth Euclid, a mathematically gifted secretary from a rural backwater, must solve the knottiest problem of all: How will he keep his liege lord safe from daggers in the back and politically scheming trollops in the night?