When the magic tree house whisks Jack and Annie off to Greenland, they're not sure what time they've landed in, but they immediately know what their mission is: save a narwhal! Then they meet a young hunter named Leif Erikson and they ask for his help. But Leif has other ideas...

"Narwhal and Jelly... and Otty?! Exuberant Narwhal and skeptical Jelly test the waters of adding a new friend to their pod when they meet Otty the super-adventurous otter in the fourth book of this blockbuster early graphic novel series! Dive into three new stories about the joy of adventure and the power of friendship! In the first story, Otty the otter makes her debut splash; while Narwhal greets her with immediate enthusiasm, Jelly's not so sure...

"Dive into three new stories about Narwhal's favorite time of the year! It's the festive season in the world wide waters, and Narwhal is looking forward to cozying up with a good book, singing and partying with his pod pals and enjoying some warm waffle pudding. But most of all he's excited about the arrival of the Merry Mermicorn! According to Narwhal, she's part mermaid, part unicorn and completely mer-aculous! Jelly is of course skeptical about...

A happy-go-lucky, waffle-loving narwhal and a cynical, no-nonsense jellyfish forge an unlikely friendship and share adventures while exploring the ocean together.

"Dive into a brand new Narwhal and Jelly story for the youngest readers! When Narwhal accidentally bursts Jelly's bubble with his tusk-tooth, Jelly is a little sad . . . until Narwhal shows him that there are lots of bubbles in the ocean! There are little-bitty bubbles and great big bubbles. There are bubbles up high and bubbles down low. There are bubbles that are pink and bubbles that stink. It's unbelieva-bubble! This charming board book celebrates...

"Narwhal and Jelly come across a strange object and wonder what its purpose might be."--

Born deep in the ocean, Kelp is not like the other narwhals and one day, when he spies a creature on land that looks like him, he learns why.

Frank Pandini Jr. is the mayor of Kalamazoo City, and everyone is celebrating-- everyone except for Zengo, O'Malley, and Cooper, who can't seem to close a single case. To make matters worse, a mysterious hulking shadow has appeared in waters around KC. Could this spell the end for the Platypus Police Squad?

Finding an old chest hidden in a sea cavern leads Violet and Wally to discover the importance of staying connected to memories.

Kiki and her friends learn about coding as they compete to be the escort for a young narwhal who will visit Trident Academy with her famous parents. Includes glossary, key to the codes used, and information about safeguarding narwhals' habitats.