Auzou Book for azuro and the last unicorn

It's a disaster! The source of the Dragon Kingdom has been poisoned, and the dragons are left without drinking water! Quickly, Azuro and his friends set off to find the only creature that can save them: the last Unicorn. Will they manage to find her? Azuro and his friends are back for an incredible adventure, in search of the most mythical of creatures: the unicorn!