Take the last sentence from the blurb of your favourite book, and use it as the first sentence of a story, no longer than 300 words.
Taken from Dead Until Dark by Charlaine Harris
And then one of Sookie's colleagues at the bar is killed, and it's beginning to look like Sookie might be the next victim ...
Sookie knows what she has to do. Run. Run anywhere, as fast as she can. These killings were not the accidents the authorities believe them to be. She saw them, the killers, and they had seen her. She backed out of the bar slowly, eyes flicking everywhere. Her heart thumped in her chest, feeling almost like it would explode. Her breath came short and sharp, fear cloying in the pit of her stomach. Cold air hit her face, pushing her hair about her head in a frenzy. In the distance, there was a high pitched howl.
Wolves. Them. They had come for her. She turned on her heel, and ran for her car, jumping inside the little old Beetle and praying to God it would start. Just as she slid the key into the ignition with shaking hands, there was a loud thump. A wolf stood on her bonnet, lips raised in a snarl. She screamed, though no one would hear her. Not now. She looked into the creatures eyes, jumping in her seat as it snapped and growled at her.
A man appeared at her window, his black hair slicked back into a pony tail, a wolf's eyes looking out from a man's body. "Get out of the car." Sookie shook her head, clicking the locks into place, and fumbling down by her side for her gun, hoping he wouldn't see. Lucky she'd been paranoid enough to buy silver bullets. He slammed his hands on the window, the glass coming through in an explosion of tiny shards. She screamed again, raising the gun level with her attacker with shaking hands.
He laughed as she closed her eyes tight. Sweat made her hands clammy as she tentatively felt for the trigger. There was a loud snarl, and she pulled the trigger.