The Tale of the Firebird by Genaddy Spirin
In all the world there is said to be nothing more beautiful than the Firebird. When Ivan-Tsarevitch, youngest son of the Tsar, goes on a quest for the amazing bird, he finds himself flying over mountains and woods on a talking wolf, confronting a wicked Baba Yaga, and rescuing an enchanted princess from Koshchei the Immortal. But when he returns from his magical journey, he brings home the most precious treasure of all.