Books like Squaring the Circle (Circle of Light, Book 4) by Niel Hancock

Bobby Pendragon is a seemingly normal fourteen-year-old boy. He has a family, a home, and even Marley, his beloved dog. But there is something very special about Bobby. He is going to save the world. And not just Earth as we know it. Bobby is slowly starting to realize that life in the cosmos isn't quite what he thought it was. And before he can object, he is swept off to an alternate dimension known as Denduron, a territory inhabited by strange beings, ruled by a magical tyrant, and plagued by dangerous revolution. If Bobby wants to see his family again, he's going to have to accept his role as savior, and accept it wholeheartedly. Because, as he is about to discover, Denduron is only the beginning.

The territory of Veelox has achieved perfect harmony. Fifteen-year-old Bobby Pendragon arrives on this territory in pursuit of the evil Saint Dane, but all is peaceful on Veelox -- because it's *deserted*. The inhabitants have discovered a way to enter their own personal dream worlds, where they can be whomever they want, wherever they want. Their bodies lie in stasis while their minds escape to this dream realm. Fresh from his battle with Saint Dane in 1937 Earth, Bobby is confident that they can defeat whatever Saint Dane has planned for this world. But once Bobby enters the virtual world, will he be able to resist the lure of the ultimate in escapism?

Fourteen-year-old Bobby Pendragon is not like other boys his age. His uncle Press is a Traveler, and, as Bobby has learned, that means Uncle Press is responsible, through his journeys, for solving interdimensional conflict wherever he encounters it. His mission is nothing less than to save the universe from ultimate evil. And he's taking Bobby along for the ride. Fresh from his first adventure on Denduron, Bobby finds himself in the territory of Cloral, a vast world that is entirely covered by water. Cloral is nearing a disaster of huge proportions. Reading the journals Bobby sends home, his friends learn that the desperate citizens of the endangered floating cities are on the brink of war. Can Bobby - suburban basketball star and all-around nice guy -- help rid the area of marauders, and locate the legendary lost land of Faar, which may hold the key to Cloral's survival?

Sailing toward dawn, and I was perched atop the crow's nest, being the ship's eyes. We were two nights out of Sydney, and there'd been no weather to speak of so far. I was keeping watch on a dark stack of nimbus clouds off to the northwest, but we were leaving it far behind, and it looked to be smooth going all the way back to Lionsgate City. Like riding a cloud. . . .Matt Cruse is a cabin boy on the Aurora, a huge airship that sails hundreds of feet above the ocean, ferrying wealthy passengers from city to city. It is the life Matt's always wanted; convinced he's lighter than air, he imagines himself as buoyant as the hydrium gas that powers his ship. One night he meets a dying balloonist who speaks of beautiful creatures drifting through the skies. It is only after Matt meets the balloonist's granddaughter that he realizes that the man's ravings may, in fact, have been true, and that the creatures are completely real and utterly mysterious.In a swashbuckling adventure reminiscent of Jules Verne and Robert Louis Stevenson, Kenneth Oppel, author of the best-selling Silverwing trilogy, creates an imagined world in which the air is populated by transcontinental voyagers, pirates, and beings never before dreamed of by the humans who sail the skies.

"If Janelle Tenner wants to avenge her father's death and stop the end of the world, she's going to need to uncover Ben's secrets--and keep from falling in love with him in the process"--

Rook Barkwater, the young librarian knight, attempts to stop Vox Verlix, the Most High Academe, in his plot to take over Edgeworld once again.

Matt Cruse, a student at the Airship Academy, and Kate de Vries, a young heiress, team up with a gypsy and a daring captain, to find a long-lost airship, rumored to carry a treasure beyond imagination.

Meet John and Philippa Gaunt, twelve-year-old twins who one day discover themselves to be descended from a long line of djinn. All of a sudden, they have the power to grant wishes, travel to extraordinary places, and make people and objects disappear. Luckily, the twins are introduced to their eccentric djinn-uncle Nimrod, who will teach them how to harness their newly found power. And not a moment too soon . . . since John and Philippa are about to embark on a search to locate a monstrous pharaoh named Akhenaten and his eerie tomb.

Now that Anakin Skywalker is a full-fledged Jedi Knight, his days of being a Padawan learner are behind him. But the Jedi Council has assigned him a Padawan of his own. Her name is Ahsoka, and this young girl just might be more than the Jedi can handle.

The struggle of good versus evil continues as Bobby Pendragon follows Saint Dane to the territory of Zadaa. Saint Dane's influence has fueled the fire of discontent between two warring tribes: the Rokador and the Batu. This is also the territory where the Traveler Loor lives as a member of the Batu. Together she and Bobby must work to thwart Saint Dane's efforts to destroy Zadaa. But as Bobby pursues Saint Dane, he begins to notice changes in himself. He is no longer a flip kid looking for excitement. He is a young man beginning to see this quest as more than a series of adventures. He is also learning that as a Traveler, he has powers no normal human should have.

Armed with their own magic and a unicorn's horn that can repel the magic of others, Score, Pixel, and Renald finally come face-to-face with the evil Sarman who needs to kill them in order to become supreme ruler of the Diadem universe.

Ash, Misty, Brock, and Pikachu go on a Pokémon fossil dig. Things get explosive when Team Rocket accidentally wakes up some cranky ancient Pokémon-- including a flying Aerodactyl!

Score, Renald, and Pixel are snatched from different worlds and taken by Bestials to the planet Treen, where they are to be offered as a sacrifice.