Volume 10: Rico & Rumi, and sammy the snake.

In this thrilling underground adventure, Rico the Rhino and Rumi the Raccoon set out to explore a mysterious crystal filled cave only to discover that its tight twists and narrow passages are harder to navigate than they expected. Luckily, Sammy the Snake glides in to help, using his incredible flexibility and agility to guide them safely through every squeeze and turn. As Sammy teaches the friends how to stay calm, move carefully, and adapt to tricky spaces and find a hidden treasure.