This box set collects Against Impassable Barriers, Over Freezing Altitudes and At Galactic Central, the fourth, fifth and sixth books in the Travels of Scout Shannon series.

Stranded on the far side of the moon with her friends, Scout Shannon waits for rescue from galactic central. Hunted by two sets of enemies, surrounded by an impenetrable barrier maintained by an almost alien class of humans, time runs short.

Caught between two factions of a powerful trade dynasty, Scout fights to remain free and to protect her friends. But the people trying to make her their pawn barely seem human to her eyes. Fight them? She can barely understand them.

With friends on both sides of the planetary blockade, Scout just needs to find a way to get her friends stuck on the inside to those waiting for them on the outside.

But foes also lurk on both sides. And they hide among her friends. How to tell friend from foe? Scout better learn before the enemies close in around her.

“Against Impassable Barriers” the fourth book in “The Travels of Scout Shannon” series, a young adult science fiction novel for fans of resourceful heroines, political intrigue, and loyal dog sidekicks.

Having escaped yet another closing trap, Scout Shannon finds herself on a snowbound mountaintop far from civilization. With assassins eager to kill her, laying low on an alien world is the smartest play.

But wherever Scout goes, trouble follows. And a hamlet in the mountains gets far more remote when girl assassins destroy the only means back to civilization.

Now Scout and her dogs face a long, cold climb back to the frozen star port city, her only guide, a girl whose sister Scout killed when fighting for her life. Can she get to safety before the girl learns the truth about Scout? And what secrets of her own is this strange girl keeping?

“Over Freezing Altitudes” the fifth book in “The Travels of Scout Shannon” series, a young adult science fiction novel for fans of resourceful heroines, survival in extreme environments, girl assassins and loyal dog sidekicks.

Galactic Central, a collection of floating cities in a vast, manmade, planetless cloud. Scout Shannon longed to see it since she first heard of it. This place long represented her shining future.

But in her less shiny present, she reaches it by smuggling herself aboard a cargo ship and hides in the lower sewer-like levels of the most opulent of the floating cities. Teams of girl assassins still hunt her. Worse, her friends are in danger and don't even know.

Scout has to save her friends, because saving her friends means saving her entire planet from enslavement to the Tajaki trade dynasty. Caught between two sides of that dynasty, with a mysterious third party desperate to remove her from the galaxy, Scout is in way over her head. But with her friends, she just might see a path to victory for all of them.

“At Galactic Central” the sixth and final book in “The Travels of Scout Shannon” series, a young adult science fiction novel for fans of plucky heroines, girl assassins, political intrigue, and loyal dog sidekicks.

Kate MacLeod