Here’s what went on sale today!

The Collapsing Empire by John Scalzi

Our universe is ruled by physics. Faster-than-light travel is impossible—until the discovery of the Flow, an extradimensional field available at certain points in space-time, which can take us to other planets around other stars.

Riding the Flow, humanity spreads to innumerable other worlds. Earth is forgotten. A new empire arises, the Interdependency, based on the doctrine that no one human outpost can survive without the others. It’s a hedge against interstellar war—and, for the empire’s rulers, a system of control.

The Flow is eternal—but it’s not static. Just as a river changes course, the Flow changes as well. In rare cases, entire worlds have been cut off from the rest of humanity. When it’s discovered that the entire Flow is moving, possibly separating all human worlds from one another forever, three individuals—a scientist, a starship captain, and the emperox of the Interdependency—must race against time to discover what, if anything, can be salvaged from an interstellar empire on the brink of collapse.

Follow Me Down by Sherri Smith

Mia Haas has built her life far from the North Dakota town where she grew up, but when she receives word that her twin brother is missing, she is forced to return home. Back to the people she left behind, the person she used to be, and the secrets she thought she’d buried.

Once hailed as the golden boy of their town, and now a popular high school teacher, Lucas Haas disappears the same day the body of one of his students is pulled from the river. Trying to wrap her head around the rumors of Lucas’s affair with the teen, and unable to reconcile the media’s portrayal of Lucas as a murderer with her own memories of him, Mia is desperate to find another suspect.

All the while, she wonders: If he’s innocent, why did he run?

Northern Stars by Glenn Grant & David G. Hartwell

From the earliest days of modern science fiction, Canada has given readers some of the most important authors in the field–and many of the finest stories. World Fantasy Award-winning editor David G. Hartwell has teamed up with Canadian writer and critic Glenn Grant to compile Northern Stars, an anthology of stories by the writers who have built Canada’s rich science fiction tradition. Now in paperback for the first time, Northern Stars is the definitive overview of science fiction’s northern frontier, a valuable addition to any fan’s library.

Spymaster by Margaret Weis & Robert Krammes

Captain Kate Fitzmaurice was born to sail. She has made a life of her own as a privateer and smuggler. Hired by the notorious Henry Wallace, spymaster for the queen of Freya, to find a young man who claims to be the true heir to the Freyan, she begins to believe that her ship has finally come in.

But no fair wind lasts forever. Soon Kate’s checkered past will catch up to her. It will take more than just quick wits and her considerable luck if she hopes to bring herself—and her crew—through intact.

NEW IN PAPERBACK

The Brotherhood of the Wheel by R. S. Belcher

In 1119 A.D., a group of nine crusaders became known as the Poor Fellow-Soldiers of Christ and of the Temple of Solomon–a militant monastic order charged with protecting pilgrims and caravans traveling on the roads to and from the Holy Land. In time, the Knights Templar would grow in power and, ultimately, be laid low. But a small offshoot of the Templars endure and have returned to the order’s original mission: to defend the roads of the world and guard those who travel on them.

Theirs is a secret line of knights: truckers, bikers, taxi hacks, state troopers, bus drivers, RV gypsies–any of the folks who live and work on the asphalt arteries of America. They call themselves the Brotherhood of the Wheel.

Nightstruck by Jenna Black

The night is the enemy, and the city of Philadelphia is its deadliest weapon.

Becket is an ordinary teenage girl, wrestling with the upheaval of her parents’ divorce. A studious high school senior, her biggest problems to date have been choosing which colleges to apply to, living up to her parents’ ambitious expectations for her, and fighting her secret crush on her best friend’s boyfriend. But that all changes on the night she tries to save an innocent life and everything goes horribly wrong.

NEW FROM TOR.COM

Chalk by Paul Cornell

Andrew Waggoner has always hung around with his fellow losers at school, desperately hoping each day that the school bullies — led by Drake — will pass him by in search of other prey. But one day they force him into the woods, and the bullying escalates into something more; something unforgivable; something unthinkable.

Broken, both physically and emotionally, something dies in Waggoner, and something else is born in its place.

In the hills of the West Country a chalk horse stands vigil over a site of ancient power, and there Waggoner finds in himself a reflection of rage and vengeance, a power and persona to topple those who would bring him low.

NEW IN MANGA

A Centaur’s Life Vol. 11 Story & Art by Kei Murayama

Lord Marksman and Vanadis Vol. 3 Story by Tsukasa Kawaguchi; Art by Nobuhiko Yanai

Merman In My Tub Vol. 6 Story and art by Itokichi