The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!!
 
When Jack and Annie got back from their adventure in Magic Tree House Merlin Mission #11: Dark Day in the Deep Sea, they had lots of questions. How big is a giant squid? What is a dragonfish?...

Their magic tree house takes Jack and Annie deep into the sea, where they meet up with dolphins, sharks, and octopi as they search for the answer to an ancient riddle.

What would happen if sixteen sea creatures met in a tournament? Who will be the ocean champion? Who do you think would win? --

A hermit crab who has outgrown his old shell moves into a new one, which he decorates and enhances with the various sea creatures he meets in his travels. Poor Hermit Crab! He's outgrown his snug little shell and has to find a new home. And he does, with help from some friends who make the move less scary. Children facing change in their own lives will relate to Hermit Crab's story-and learn a lot about the fascinating world of marine life along the...

"Ever since her father was lost at sea, Sophia has been moping around Aqualand, a marine theme park. But Sophia's world is turned upside-down when an "aquanaut" breaks into the park's research lab. To her amazement, Sophia discovers that the aquanaut is not what it seems: inside lives a band of goofy sea creatures! And when they all realize that Aqualand is more sinister than advertised, Sophia is determined to help the aquanaut crew free the park's...

"Explore unusual animal locomotion through incredible art and fascinating facts from the Caldecott Honor-winning team Steve Jenkins and Robin Page." --

"Explore the wonders of the ocean's kelp forests in this . . . [book]. Over the waves, the sea lions bark and seagulls wheel and call. The bay is smooth and bright in the sun. But under the waves, there's a whole hidden forest, full of whales and wolf eels, sardines and sea bass, leopard sharks and luminous jellies, as well as the waving kelp that shelters them all"--Provided by publisher.

Astro, an orphaned, endangered Steller sea lion, was found and then raised at the Marine Mammal Center in California. When released, he kept swimming back to the Center, just like a lost dog finding his way home. Readers follow Astro through some of his travels that have now taken him across the U.S. to his current home at the Mystic Aquarium in Connecticut. Includes "For Creative Minds" educational section.

Provides a top-to-bottom look at the ocean, from birds and waves to thermal vents and ooze.