As a successful social media journalist with half a million followers, 17-year-old Cal is used to sharing his life online. But when his pilot father is selected for a highly publicized NASA mission to Mars, Cal and his family relocate from Brooklyn to Houston and are thrust into a media circus. Amidst the chaos, Cal meets sensitive and mysterious Leon, another "Astrokid", and finds himself falling head over heels - fast. As the frenzy around the mission grows, so does their connection.

Sebastian Villeda is over it. Over his rep. Over his bros. Over being "Bash the Flash," fastest sprinter in South Jersey. His dad is gone, his mom is dead, and his stepfather is clueless. Bash has no idea what he wants out of life. Until he meets Sandro.

Linus Baker is a by-the-book case worker in the Department in Charge of Magical Youth. He's tasked with determining whether six dangerous magical children are likely to bring about the end of the world. Arthur Parnassus is the master of the orphanage. He would do anything to keep the children safe, even if it means the world will burn. And his secrets will come to light.

Crest is not excited to be on their Journey: the month-long sojourn on land all teen merfolk must undergo. The rules are simple: Help a human within one moon cycle and return to Pacifica to become an Elder—or fail and remain stuck on land forever. Crest is eager to get their Journey over and done with. Humans are disgusting. They’ve polluted the planet so much that there’s a floating island of trash that’s literally the size of a country.

Rune Saint John, the last child of the fallen Sun Court, is hired to search for Lady Judgment's missing son, Addam, on New Atlantis, the island city where the Atlanteans moved after ordinary humans destroyed their original home. With his companion and bodyguard, Brand, he questions Addam's relatives and business contacts through the highest ranks of the nobles of New Atlantis. But as they investigate, they uncover more than a missing man: a legendary creature connected to the secret of the massacre of Rune's Court.