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In New York Times best-selling author Dan Gutman's all-new series, which blends fascinating real history with an action-packed and hilarious adventure, four very different kids are picked by a mysterious billionaire to travel through time and photograph some of history's most important events. This time the four friends are headed to 1863 to catch Abraham Lincoln delivering his famous Gettysburg Address.

In this explosive third installment of New York Times bestselling author Dan Gutman’s action-packed series, four thrill-seeking friends travel back in time to document one of the most devastating natural disasters the world has ever seen.

Trust dreams, trust your heart, and trust your story. A renowned storyteller whose words have transported readers to magical realms guides a traveler safely through lands unknown and yet strangely familiar...and home again.

Using his father's watch as a key, Jake intends to return to Calypsos. Instead he's thrust into a strange desert land where he's joined by his friends Marika, Pindor, and Bach'uuk and his sister, Kady. As they try to figure out what to do next, a surprise attack by the beautiful young Princess Nefertiti takes them all captive. Soon even she is battling the Skull King's minions. For Jake has something the Skull King wants - a prize that will give its owner awesome power, including control of the fearsome Howling Sphinx.

Lopside is a Barkonaut - a specially trained dog who assists human astronauts on missions in space. He and the crew aboard the spaceship Laika are en route to set up an outpost on a distant planet. When the mission takes a disastrous turn, the Barkonauts on board suddenly find themselves completely alone on their severely damaged ship. Survival seems impossible. But these dogs are Barkonauts - and Barkonauts always complete their mission.

A 31st-century boy and a 21st-century girl team up to save the universe, evade an evil race of bog mutants, and make a quick pit stop to visit the moon in Dimension Why. John Cusick’s middle-grade debut will transport you to a vast fantasy world full of absurd humor that will keep you gasping all the way to the twist ending.

Finn Caspian, his three best friends, and his robot Foggy are excited to explore a brand-new planet...until Finn’s mom makes them bring along an annoying new robot named Voltronix Zu. Putting up with Voltronix’s bragging is bad enough, but when he accidentally turns the planet inside out, the Explorers get attacked by angry rock giants! Can the four friends find a way to save the planet - and the bubble aliens who live there - before Voltronix causes a volcanic disaster?

Eight-year-old Finn lives is the first kid born in space and he spends his days looking for a new planet to call him with his three best friends and his robot, Foggy. He’s used to wild, galaxy hopping adventures. But when Explorer Troop 301 gets stuck on a planet that’s about to explode, Finn and his friends will have to face giant aliens, a leader with mind control powers, and one evil, fluffy bunny rabbit in order to save the planet...and themselves.

Ever since Corey Fletcher found out that he’s the world’s first “throwback,” with the power to not only visit history, but change it, he’s been spending as much time in the past as possible. Corey loves using his skills to fix problems and help his friends and family. But as Corey becomes more and more addicted to rewriting history, he learns that time travel might change him in ways he may never be able to reverse.

Michael Prasad knows he shouldn’t go out on the Mars surface alone. It’s dangerous. His parents have forbidden it. And the anxiety he feels almost every time he puts on a spacesuit makes it nearly impossible for him to leave the safety of the colony. But when his best friend, Lilith, suggests they sneak out one night, he can’t resist the chance to prove everyone - including himself - wrong.

Billionaire Miss Z might be out of the picture, but a top-secret agency wants to send Luke, Julia, David, and Isabel on one final mission. This time, the Flashback Four are headed to Weehawken, New Jersey - in 1804 - to videotape the fateful duel between Alexander Hamilton and Aaron Burr. But once they arrive, the team faces a question of historic proportions: Should they capture the tragic details of the duel or try to change them?

When Princess Mary ascends the throne in sixteenth-century England, Rose is forced to leave Princess Elizabeth and serve Mary. But the religiously devout queen’s next plan is to begin her attack on Protestants - burning them at the stake! Rose’s dad urges Rose to escape to her home century, present day Indiana, where Rose befriends a young immigrant named Marisol. Relishing her newfound family, Rose is determined to rescue her father and best friend Franny from the dangers of Queen Mary's reign. Is she willing to risk everything to save the people closest to her?

Cog looks like a normal 12-year-old boy. But his name is short for “cognitive development”, and he was built to learn. After an accident leaves him damaged, Cog wakes up in an unknown lab - and Gina, the scientist who created and cared for him, is nowhere to be found. Surrounded by scientists who want to study him and remove his brain, Cog recruits four robot accomplices for a mission to find her. Cog, ADA, Proto, Trashbot, and Car’s journey will likely involve much cognitive development in the form of mistakes, but Cog is willing to risk everything to find his way back to Gina.

It was only a few weeks ago that the Biedermann twins, Tess and Theo, along with their friend Jaime Cruz, followed the secrets of the Morningstarrs’ cipher further than anyone had in its century-and a-half history - and destroyed their beloved home in the process. But the Old York Cipher still isn’t solved. The demolition of 354 W. 73rd Street only revealed the next clue in the greatest mystery of the modern world, and if they want to discover what lies at the end of the puzzle laid into the buildings of New York by its brilliant, enigmatic architects, they will need to press on.

Greg Rich should feel invincible. After all, he’s traveled through time, become one of the legendary Musketeers, and - most recently - prevented the Spanish army from attacking Paris. Instead, he and his friends are languishing in prison, having fallen into a trap set by Milady and the prince of Condé. But Greg didn’t come to the 17th century to sit in a jail cell and await execution. He, Aramis, Athos, and Porthos need to get to King Louis, who is in immediate danger of being overthrown by the scheming prince.

Having assumed the identity of a young D’Artagnan, Greg Rich is beginning to get the hang of things in 1615 Paris. But he hasn’t figured out how to get home yet. Or how to defeat the dangerous Michel Dinicoeur, who has made it his mission to destroy Greg, Athos, Aramis, and Porthos. When Dinicoeur escapes the Bastille and flees to Spain, the Musketeers charge after him, only to be ambushed. Someone is anticipating their every move. Could there be a traitor in their midst?

On a family trip to Paris, Greg Rich's parents disappear. They're not just missing from the city - they're missing from the century. So, Greg does what any other 14-year-old would do: He travels through time to rescue them. Greg soon finds out that his family history is tied to the legendary Three Musketeers. But when he meets them, they're his age, and they'll only live long enough to become true heroes if he can save them.

Life used to be great for Rose: full of friends, a loving mom, and a growing fashion blog. But when her mother dies in a car crash, Rose is sent away to live with a strange grandmother she hardly knows and forced to attend a new school where mean girls ridicule her at every turn. The only place Rose finds refuge is in her grandmother’s greenhouse. But one night, she sees a strange light glowing from within it. She goes to investigate...and finds herself transported back 500 years to Hatfield Palace.

In Turbo Racers: Trailblazer, twelve-year-old Mace Blazer gets the chance to pilot a state-of-the-art vehicle that transforms at the touch of a button from race car to jet plane to single-person sub, in the biggest race in the world.

Corey Fletcher has an active imagination. He sees things no one else does. Cracks jokes no one else gets. And goes places few would ever dare go. Like the past. All he needs is a metal artifact from a point in time, and Corey can go there. Although hundreds of time travelers live in secret throughout the world, including Corey's own grandfather, none has the ability to change past events.