A New York Times Bestselling series
“Hilarious and charming. The most lovable duo since Frog and Toad.” —NYT-bestselling creator of the Dog Man and Captain Underpants series, Dav Pilkey
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...

This nineteenth-century tale of an electric submarine, its eccentric captain, and the undersea world, anticipated many of the scientific achievements of the twentieth century. The adventures of a French scientist and his companions who travel the seven seas as prisoners in the submarine of the mysterious Captain Nemo.

"The two best friends come across an enthusiastic school of fish one morning. Unfortunately, Mr. Blowfish, their teacher, has come down with a cold, and class will have to be cancelled ... until Professor Knowell (Narwhal) and Super Teacher (Jelly) volunteer to help out! The first subject is Wafflematics, in which Narwhal and Jelly calculate the number of waffles needed to feed the class. That's what we're chalking about! Next up is a super-fun science...

Unsinkable detectives Mango and Brash are back in InvestiGators: All Tide Up, a high seas adventure that takes the hit series by John Patrick Green to uncharted waters! Three million readers can't be wrong – don't miss the boat!
When a cruise captain is found drifting at sea and delirious, the search begins for his missing ship and passengers! Did it sink? Was it boat-napped? Are supernatural forces at play? And can the InvestiGators

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Dessa convinces the smuggler Quinn to transport her, Topper and Fisk to the mysterious Island of Astaroth. Dessa is convinced her twin brother, Jared, who was abducted years earlier by the Queen's chamberlain, is being held on the island. However, soon after setting sail, they are overtaken by a pirate ship commanded by the King of Pirates, whom they discover is interested in only one treasure on board: Dessa's map to the location of Astaroth! Will...

In 1751 in Scotland, cheated out of his inheritance by a greedy uncle who has him kidnapped and put on a ship to the Carolinas, seventeen-year-old David Balfour escapes to the Highlands with the help of the Jacobite Alan Breck Stewart and there encounters further danger and intrigue as he attempts to clear his name and regain his property.