Lindsey Davis 
The Course Of Honour 

A true, historical love story from the bestselling author of the Falco novels.
‘He has no money, no reputation and no famous ancestors.’
The love story of the Emperor Vespasian, who brought peace to Rome after years of strife, and his mistress, the freed slave woman Caenis, this book recreates Ancient Rome’s most turbulent period – the reigns of Tiberius, Caligula, Claudius and Nero and Vespasian’s rise to power.
As their forbidden romance blossoms, Caenis is embroiled in political intrigue, while Vespasian embarks on a glorious career. Years pass, then Vespasian risks all in the climactic struggle for power – bringing hope for Rome, but a threat to the relationship that has endured for so long.