Anna & Elsa: Sisterhood is the Strongest Magic

Anna & Elsa: Sisterhood is the Strongest Magic is a book series written by Erica David and published by Random House. The series continues the adventures of Princess Anna, Queen Elsa, Olaf the snowman, and the rest of the characters from Disney's 2013 animated film Frozen.

The book series was released on January 6, 2015 following the first two books All Hail the Queen and Memory and Magic.

Books
Anna & Elsa #6: The Arendelle Cup Princess Anna, Queen Elsa, Olaf the snowman, and all the stars from Disney Frozen are back in an all-new magical chapter book series perfect for girls ages 6 to 9. It's time for the Arendelle Cup--an annual 150-mile sleigh race. People come from far and wide to compete, and this year, to celebrate the castle gates finally being open, Anna and Elsa are going to represent Arendelle themselves!