Book 9 in the Spy Dog adventures - now a number 1 bestselling series! Spy Dog, aka Lara, isn't the only Mummy around...National security is under threat! The evil Mr Big has escaped from prison again and he's on a mission to steal Egypt's most valuable treasure, The Nile Ruby. The Prime Minister knows only one agent can stop this evil criminal mastermind - Spy Dog! But can Lara learn some new tricks in time to find the ruby, protect her Pups and get Mr Big back in jail where he belongs?Spy Dog - winner of the Richard and Judy 7+ developing reader category, and the Red House Children's Book Award.