Kate O'Hearn

Titan granddaughter Astraea and her winged-horse companion Zephyr find a human boy, Jake, on their world, and as the three work together to figure out how Jake arrived, they uncover a plot to take over Titus, and ultimately the universe.

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

Riley thought she was through with Atlantis, but when the Atlanteans who came back with her (and are currently living in the basement) become gravely ill it becomes clear they must all return to Atlantis--and face the enemies they made during their escape.

"Pegasus and Emily investigate a series of incidents back on Earth, and discover that the CRU has been cloning Olympians"--

Can Emily control the power of the flame and save Olympus? Or is everyone--god and human--doomed? A deadly plague has struck Olympus. When Pegasus falls ill, Emily has to act. Her hunt for a cute takes her to modern London and back to the origins of Olympus. In the present, she must face the full forces of the CRU. In the past, she must confront Cronus, the father of the gods and leader of the Titans, who is intent on destroying his offspring. When...

"Freya is a Valkyrie, a reaper of souls. But she hates what she must do. She doesn't like humans and the pain they inflict on each other, and she never wants to visit another battlefield. But when a soldier begs her to help his family back in the human realm, she agrees and discovers a world of friends. Now she'll have to find a way to keep her promise to the soldier and prevent the wrath of Odin from destroying the world"--

Emily is contending with great changes, including diminished powers, but goes to London to rescue Agent B and others from the CRU, where she makes horrible discoveries about the agency's history.

"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"--

"Astraea and Zephyr venture to the Mimic home world in order to save Titus and defeat the Mimics for good"--Provided by publisher.

With the rainbow bridge closed, Freya and the Valkyries must find another way to try to stop the war that threatens not just Asgard, but the human world, as well.