The Legend of Bigfoot - Monster Secrets Series, #1

Walker discovers the Bigfoot legend in an old book and sets off on an adventure to find Bigfoot with Gianna, Lincoln, Everleigh and their guide Hans. They encounter all kinds of dangers in the Swiss Alps, including mysterious monsters and attacks from the greedy Jose and his men. During the adventure, they solve the puzzles in the mysterious cave, face challenges with Bigfoot and gradually get closer to the secret of Bigfoot.