O'Hearn Kate Book order (chronological)

Astraea, Zephyr, Pegasus, and Tryn turn to an old enemy to save them from a desperate situation in this third book in a new series from bestselling Pegasus author Kate O’Hearn, who masterfully blends mystery and mythology together.Jake, Nesso, and Emily have been captured by the Mimics. Their friends are determined to rescue them before it’s too late, though that’s easier said than done. Driven from their home and facing a constant stream of new attacks, Astraea, Zephyr, Pegasus, and Tryn are struggling just to survive another day against Mimics who can kill with a touch and take the shape of any friend or family member.While Jupiter is focused on returning to Titus, Astraea knows their only hope is to take the fight to the Mimic home world and stop the Mimic queen herself. To do that, they’ll need to even the odds of seven friends versus an entire planet. So they come up with a plan to capture the one thing more terrifying than their enemy—the giant snake Lergo.Seeking out the serpent that almost killed them seems like a terrible idea. But it will take more than one unlikely ally to save their friends—not to mention the universe—and defeat the Mimics for good.

A group of kids must stop invaders before they take over Titus and the rest of the universe in the first book in this new series from bestselling Pegasus author Kate O'Hearn.

Freya searches for a missing Valkyrie in this second book of an exciting series that School Library Journal described as perfect for “those looking for Rick Riordan read-alikes.” Valkyrie: Norse Goddess. Reaper of Souls. Defender of the Weak. But could she also start a war? In the world of Asgard, living among Odin, Thor, and Loki are the Valkyries of legend. Norse goddesses, reapers of souls from human battlefields—they have the power to cause death with just one touch. Freya is a Valkyrie—but she has not followed in the footsteps of the legends before her. She has been to the World of Man to befriend humans—and not to reap their souls. Now she must return to the human realm on a new quest to track down the runaway Valkyrie of legend. There she will discover a dark secret that leads her to the Land of the Frost Giants where she must take on new enemies. But this time she has friends to rely on, and lots more to gain.