The Horse Who Would Be Emperor — Katherine Roberts

Emperor Caligula's favourite racehorse Incitatus the Swift eats gold for breakfast, attends the Senate, and has 18 slaves to look after him. When Caligula names Incitatus heir to the throne, the horse's stylist Livia and young charioteer Marcus are caught up in a plot to assassinate the mad emperor and restore the Republic to Rome. Livia is sentenced to death fighting tigers, while Marcus must risk life and limb racing in the Circus Maximus. Only Incitatus can save them... but how can a horse be Emperor of Rome? An exciting adventure of chariot racing and gladiatorial battles from the author of 'I am the Great Horse'.