Kate O'Hearn

"When Riley and her family are stranded on the mythical island of Atlantis, they'll have to uncover its secrets in order to find a way home"--

When her brother and friends are kidnapped, Riley embarks on a quest to enter the Enchanted Territory and ask the Fairy Queen for help; but in order to succeed, she must navigate the magical societies and learn the truth behind the history of Atlantis.

"Freya and Archie are sent back to Earth by Odin in order to locate a banished Valkyrie and bring her back to Asgaard. But Brunnhilde has built a life for herself on Earth and has no desire to return. And what Freya learns about that life, changes her understanding of her own family"--

Living on Olympus with her friends Joel and Paelen and the flying horse Pegasus, Emily Jacobs waits for a moment when she can return to the human world and save her father. When Olympus is invaded, however, their loyalty and resolve is put to the test as they combat new enemies.

"A deadly plague has struck Olympus and is slowly aging and killing the Olympians. Emily can only stand by and watch as those she loves fade and die. But in one last desperate attempt to save those she loves, she journeys back to Earth to face the CRU, then back in time to confront Cronus, leader of the Titans and father of the gods"--

The Frost Giants, Fire Giants, and Dark Searchers have declared war on the Realms and Bifrost is closed. With their only way back to Asgard blocked, Freya and the Valkyries can't get back to protect their homeland. As the war of the Realms spills over into Earth, Freya and the Valkyries must find a way to save not only the Norse world, but the human world as well.

After Olympus is destroyed, the remaining Titans settle on Titus and Earth is quarantined. The Titans and Olympians are just barely maintaining a peace. When Titan Astraea and her winged horse Zephyr find a human boy named Jake on their world, they must figure out how he got there and why. What the trio uncovers is a plot to take over Titus and ultimately the universe.

Astraea, Zephyr, and their team have freed the Titan prisoners and safely hidden them on Earth, and now are headed to Nesso's jungle world to get help fighting the aliens who want to invade Titus. On the jungle world, the team is met with dangers they never imagined, from famished dinosaurs to the blistering sun. Zephyr is critically wounded, forcing Jake and Tryn to travel to Xanadu for help, leaving Astraea and three centaurs behind to guard Zephyr...

Kira has done all that she can to protect and shield her younger sister, Elspeth. Now it's time for Elspeth to grow up. When Paradon's muddled magic sends the two sisters traveling through time to different eras, new challenges and terrifying threats await each. Elspeth is in the past and Kira in the future. And Kuira must find a way to get back to Elspeth and reunite her family.