Toto the ninja cat and the mystery jewel thief

"Toto and her friends are due to be looking after the French ambassador on a day of sightseeing, finishing at the Tower of London to see the animal world's crown jewels: a sacred diamond cat collar. But when they arrive, the collar has disappeared - and what's worse, it looks like Toto is responsible! Toto is almost arrested, but she escapes to try and get to the bottom of the mystery and clear her name."--Provided by publisher.