On a clear day, from the top of her house, Rosalie Dumarque could see all that was left of the human world.      Standing on the peaked roof of the colossal Dumarque Manor, which was itself perched atop one of the tallest hills in the district, she could look right over the fifty-meter-high circle of Wall Sina into the terrain beyond. This early in the morning, the towns and fields of the Rose Zone were still hazy with the autumn fog, but if she squinted, Rosalie could just make out the white ribbon of Wall Rose running along the horizon, 130 kilometers away.      The sight never failed to make her stomach tighten. More than a marvel of engineering, Wall Rose was a boundary. The fifty-meter-tall circle of stone marked the edge of human civilization, the end of the world.      It hadn't always been this way. For most of her childhood, the end of the world had been at Wall Maria, nearly twice as far away. Growing up, Rosalie had considered the walls a default component of reality, like the sky or the ground. They were always there, the unbreakable barrier that shielded everything she knew from the monsters that stalked the wilderness beyond.      Then, five years ago, the monsters had broken through.      In a single day, the land left to humanity was diminished by a third. With Wall Maria broken, all territory between it and Wall Rose--all the cities and farms and forests in the Maria Zone--was now the domain of titans, not humans.      Rosalie's personal world was even smaller. She'd never been allowed outside Wall Sina, the heavily fortified inner ring that protected the king and all the noble families. She failed to see much difference; big or small, a prison was a prison. So long as titans existed, the world would always be walled in. And humans were no better than cattle in a pen, patiently waiting for the day the wolves broke through to finish them off.      As always, that bitter realization ruined the view. Clenching her fists, Rosalie pushed off the chimney she'd been leaning against and started down the steep roof. A few of the clay tiles shifted under her feet, reminding her sharply of the long fall to the ground below, but Rosalie wasn't afraid. She'd never been as graceful as her elegant older sisters, but her time in the Royal Military Academy had toned her muscles, honed her sense of balance, and erased any fear of heights. Also, she'd been climbing up here since she was tall enough to push open her bedroom window. She knew every wobbly tile by heart.      When she reached the edge of the slanted tiles, Rosalie lowered herself to sit back on her heels. Down below, her family's estate--extravagant even by noble standards--spread out like a perfect green carpet all the way to the base of Wall Sina. The army of groundskeepers was already hard at work pruning fruit trees, weeding flower beds, bringing in sheep to crop the grass, and all the other essentials necessary to keep the massive estate looking well kept.      She knew exactly how many essentials there were. Her mother had drilled her on proper land management for years, in preparation for the day when Rosalie would be lady of her own house. Soon, she'd be the one whose world revolved around making sure all the tedious little details of keeping up appearances were taken care of.      But not just yet.      Rosalie rose back to her feet. A wind blew up from the south as she stood, blowing a wisp of her blonde hair loose from its braid and into her face. Rosalie tucked the strand behind her ear impatiently as she turned to stare at Wall Rose again, its curved white line gleaming back at her like a mocking grin.      Rosalie grabbed the lip of the roof and lowered herself to her bedroom window to do what she'd come home to do. Excerpted from Garrison Girl: An Attack on Titan Novel by Rachel Aaron All rights reserved by the original copyright owners. Excerpts are provided for display purposes only and may not be reproduced, reprinted or distributed without the written permission of the publisher.