Jack and his friends desperately search for the rest of the lost Loculi and confront the armies of Artemis in order to rescue Aly, who has been pulled back into Atlantis by King Uhla'ar.

Fourteen-year-old Kaya, of the undersea, high-tech world of Atlantis, and twelve-year-old Lewis, of the climate-threatened world above water, embark on a dangerous adventure when he enters her realm.

Teens Jack, Marco, Aly, and Cass begin a quest to find seven pieces of Atlantis' power that were hidden long ago and that will, if returned to Atlantis, save them from certain death due to the genetic abnormality that also gives them superior abilities.

Lewis, Hanna, and Kaya, their resourceful Atlantean friend, embark on an all-new journey through Atlantis, from the sunken underwater world of Evenor to the tunnels below Ridge City. Bonus content includes science and robotics concepts in the story, and a scientist's take on the curious biology of mermaids.

Tim and his friends flee the hazardous Sea of Terror and head toward the city of Atlantis in pursuit of King Neptuna's stolen trident.

From the lost journals of the New York Times bestselling Seven Wonders series comes the story of how Atlantis came to rest at the bottom of the sea. Follow the threads of history back to ancient times. Two Atlantean princes, Karai and Massarym, obsessed with power and terrified of the mysterious Loculi, turned it against each other in a bitter rivalry. With the future of the world at stake and nowhere to turn for guidance, the fourteen-year-old brothers...

The young thief Promi and the forest girl Atlanta battle evil and in the process bring about the creation of Atlantis.

Promi and Atlanta continue the fight against the evil spirits and their mortal counterparts on the island of Atlantis.