Books in the Time-Travelling Cat series

Topher Hope is on the move again. Topher, now a British boy, apprenticed to a Roman mosaic maker, has mixed loyalties. When the eagle, symbol of Roman power, disappears from the forum, threatening the fragile peace, Topher begins a desperate search. In this adventure Topher needs all the amazing powers of the time-travelling cat.

Topher's cat, Ka, has time-travelled again and left him yet another mysterious clue. Following his nose, Topher finds himself in Victorian London where disease is rife and the Thames is clogged with sewage! There he discovers a plot to kill Joseph Bazalgette, the man who is trying to save the city, and is determined to foil this foul plan.

Topher and his father are trying to get over the death of Topher's mother, an Egyptologist, when they take in a stray cat. This cat bears an uncanny resemblance to a cat ornament given to Topher by his mother and so they name it 'Ka', meaning 'double'. Could Ka really be leading a double life and what is she trying to tell Topher?

Topher is planning a trip to London to visit his friend Ellie - but will it be safe, with all the terrorist threats? And sure enough, in the middle of a big bomb alert, Topher is called away - to a Saxon village threatened by Norsemen.