The Time-Travelling Cat and the Great Victorian Stink

Topher's amazing cat, Ka, has time-traveled again, leaving him another mysterious clue. Topher finds himself in Victorian London, where disease is rife and the Thames is clogged with stinking sewage! There he discovers a plot to kill Joseph Bazalgette, the man trying to save the city. Determined to foil this foul plan, Topher must first escape from an arch-criminal and his den of thieves.