Auzou Book for dinosaurex tome 7 how to adopt a dinosaur

During their excavation in the Gobi Desert, Dimitri and Noémie find themselves transported to the Cretaceous period... and when they return home, they're not alone! A baby Troodon has followed them! The two kids will have to show amazing ingenuity to hide it from their parents, feed it, and prevent it from escaping. Who said adopting a dinosaur was easy?