Auzou Book for me arthur, master of the lost kingdom volume 3 the final battle

Arthur and Rose now know: the imaginary world they invented as children, Groaar, is real. What's more, what they thought would be the end, "Là-bas", is not! All the children's inventions they threw away on the island of Groaar still exist... As they set off to explore this brand new playground, however, they forget that some of their inventions have been banished for a reason... An opportunity for Crowky, the terrible raven scarecrow, to find new allies. Even if it means destroying Groaar once and for all. That's where the final battle will be fought...