Anna, Elsa, and the Secret River is an original picture-book tied into Frozen 2. It tells of a mysterious white river that is said to hold answers about the past. Elsa and Anna’s mother once sang a lullaby about it. Believing this river may help them understand their history and destiny, the sisters set off on an adventure to find it. Along the way, they travel through enchanted landscapes, face challenges, and discover truths about their family and themselves.