Halley, who covers house-sitting jobs for her self-absorbed mom, has Hollywood dreams but no real life. Until the day a job for her mom leads to a tumble back to London, 1598, where Halley meets a hot, rich earl named Edmund. And accidentally brings him to the 21st century.Her summer just got a whole lot more interesting as she tells Edmund to keep his hands off tech he doesn't understand and a deadly sword he can't use in public. All while trying to keep from falling in love with ...

Samantha hides a secret genetic ability to vanish from sight. When she learns about a megalomaniac who wants to use genes like hers to create an invisible army, she's determined to stop him before he topples governments and destroys everyone she loves. In the struggle to protect her family, a newfound crush, and humanity itself, her own life seems a small price to pay. But how do you fight an enemy you can't see?

Jillian and Everett’s wedding plans are upended when mysterious time-traveler Dr. Duval steps out of the shadows and into their lives. Removing the Eiffel Tower as part of an experiment, Duval inadvertently creates a new timeline where the United States of America disappears in 1804 and is replaced by a French monarchy. Duval may not care whether America is a kingdom or a democracy, but he’ll stop at nothing to understand how spacetime operates. Desperate for information h...

Trouble brews when Quintus Valerius hears slander against Julius Caesar and wants to go back in time to fix things. DaVinci, of course, is having none of it. Meanwhile, another physicist is unlocking the secrets of time travel. When a trip to 1935 unites them along with Walt and Lillian Disney, things go sideways and history is damaged. Now Quintus and DaVinci must patch up their difference and race to restore things before Disneyland vanishes forever.

From Kirkus Award-Winning Author Cidney Swanson: Samantha Ruiz has always blamed herself for her mother's untimely death, until she learns it may be linked to genetic experiments dating back to World War II. Suddenly Samantha's uncanny ability to vanish from sight or "ripple" looks like more than just an amusing superpower. Now it might get her killed. A swoon-y crush shows up in her life, offering help and secrecy, but he also confirms there are people eager to g...

Grounded for her Top Gun attitude, a Mars colony pilot jumps at the chance to fly a covert mission to enemy Earth in order to save her world from starvation. When her brother is captured during the raid, pilot Jess finds an ally in a handsome Terran, but their friendship makes her choice more agonizing than ever: rescue her brother or save Mars?

DaVinci's younger sister Klee has always played second fiddle to her twin Kahlo, but all of that changes when Klee decides to secretly travel back in time to save Alexander Hamilton's son Philip from dying in a duel. Unfortunately Klee didn't read the user's manual, and soon she's risking the lives of everyone she cares about in the 21st century for the sake of Alex and Eliza's rakishly handsome (and frustratingly stubborn) son Philip.

Modern girl DaVinci doesn't recognize her life after a quick trip to the past turns her world upside down. Meanwhile Quintus, a swoony soldier from 53 BC stuck in this century, is set on time traveling to make good on a promise to Julius Caesar. When Quintus and DaVinci accidentally travel together to ancient Rome, the feisty pair are in danger of falling in love, if they don't kill each other first. One thing is clear: they've got to learn to get along if they want to mak...

Modern girl Jillian time travels to the 1900s to meet the Wright brothers and beat her fear of flying. There, she encounters dashing Everett, who broke from his wealthy family to pursue a passion for flying - and who claims they kissed 5 years ago. Soon she's falling for him and facing a heartbreaking choice that could destroy her happiness or unravel history itself.A Flight in Time and its sequels are swoony young adult romances packed with thrilling action and historical detail.

Now back on Mars, Jessamyn must rebuild her life without Pavel or her brother Ethan. Jess guards a secret which could launch an interplanetary war, and in order to save the world she loves, she must defy it.

Sam wants to hold onto the community she's found in Las Abuelitas, but Georg has plans to change the world forever. While Skandor seeks clues to find Katrin, people are vanishing, and Sam and Will must take action before their peaceful life in Las Abs disappears, too. Romantic and thrilling, PERILOUS brings the Ripple Series to its breathtaking conclusion

Jessamyn survives a terrifying crash but loses her ship, joining Pavel, and Ethan in a dissenter village. The Terran Chancellor believes Jess is out to destroy her government and will stop at nothing to find Jess. When Lucca places a spy in their midst, secrets are spilled that could mean the loss of everything--and everyone--Jess holds dear.