Kate just wanted to meet her infamous, estranged grandfather, she didn't expect to encounter skulls hidden on his property. And she didn't expect Zach, the exasperating boy next door, to be the only person who can help her solve a thirty-five-year-old cold case.

Rook and Gage live worlds apart — but somehow they must find a way to help one another survive. Trapped in a life she didn’t choose, Rook struggles to find meaning in her appointed role as Apprentice Keeper of ArHK. Even though her mother soothes her with legends of the Outside and her father assures her there are many interesting facts to discover in the Archives, Rook sees only endless years of tracking useless information. Then one day Rook discovers historic footage of the Chosen Ones arriving in ArHK, and she begins to realize her mother’s legends are more than bedtime stories. That’s when Rook begins her perilous and heartbreaking search for the limitless sky. Gage is also trapped. Living on the frontier line with his family, his is a life of endless moving and constant danger. As he works with the other Scouts, Gage searches for the Ship of Knowledge to help his society regain the wonders of the long distant past, when machines transported people across the land, illnesses could be cured, and human structures rose high into the sky. Will Rook and Gage escape the traps and perils that await them in order to save each others worlds? If they don’t, it could very well be the end of humanity.

As crazy as her father's plan sounds, sticking to it is easy for Harbour - until it isn't. Fourteen-year-old Harbour is living in a tent in a Toronto ravine with her dog, a two-month supply of canned tuna, and an unconventional reading list. She's not homeless, she tells herself. She's merely waiting for her home - a thirty-six-foot sailboat - to arrive with her father at the helm. Why should she worry when the clouds give her signs that assure her that she's safe and protected? When her credit card gets declined, phone contact from her father stops, and summer slips into a frosty fall, Harbour is forced to face reality and accept the help of a homeless teen named Lise to survive on the streets. Lise shows Harbour how to panhandle and navigate the shelter system while trying to unravel Harbour's mysterious past. But if Harbour tells her anything, the consequences could be catastrophic.