Canada’s Aurora Award for Best Young Adult Novel 2015
When seventeen-year-old Toby McGonigal finds himself lost in space, separated from his family, he expects his next drift into cold sleep to be his last. After all, the planet he's orbiting is frozen and sunless, and the cities are dead. But when Toby wakes again, he's surprised to discover a thriving planet, a strange and prosperous galaxy, and something stranger still—that he's been asleep for 14,000 years.
Welcome to the Lockstep Empire, where civilization is kept alive by careful hibernation. Here cold sleeps can last decades and waking moments mere weeks. Its citizens survive for millennia, traveling asleep on long voyages between worlds. Not only is Lockstep the new center of the galaxy, but Toby is shocked to learn that the Empire is still ruled by its founding family: his own.
Toby's brother Peter has become a terrible tyrant. Suspicious of the return of his long-lost brother, whose rightful inheritance also controls the lockstep hibernation cycles, Peter sees Toby as a threat to his regime. Now, with the help of a lockstep girl named Corva, Toby must survive the forces of this new Empire, outwit his siblings, and save human civilization.
Karl Schroeder's Lockstep is a grand innovation in hard Science Fiction space opera.

Karl Schroeder was born to a in Brandon Manitoba. His family is part of a Mennonite community that has lived in southern Manitoba for over one hundred years. Karl moved to Toronto to pursue a writing career. His novel Permanence won the 2003 Aurora Award for best Canadian SF novel. Karl is married with a daughter and he divides his time between writing fiction and consulting - chiefly in the area of Foresight Studies and technology.

Karl Schroeder's profile page

Karl Schroeder is one of our best hard SF writers. He takes us this time to the shadow worlds far from suns, showing how humanity can colonize even such cold spaces. -Gregory Benford, author of Timescape

"Easily the most invigorating, most scientifically curious book I've ever read." -Cory Doctorow

"One of the best ways to think about the future is to create something to think with-such as a machine, a scenario, or a story. There are people who do this for a living: futurists, for instance, and writers of speculative fiction. Karl Schroeder is both." - The Atlantic