The Great Ice Engine

The Great Ice Engine is the fourth book in the Anna & Elsa: Sisterhood is the Strongest Magic series.

Description
''Anna has an adventurous spirit. Elsa has magical power over ice and snow. Together the sisters explore the mountains, palace, fjords, and beyond as they finally get to know each other as sisters and friends.''

Characters

 * Anna
 * Elsa
 * Oaken
 * Jarl (mentioned)
 * Stellan
 * Kristoff
 * Olaf
 * Sven
 * Norvald
 * Ice harvesters
 * Brigida
 * Blacksmiths