The Dark Horse by Marcus Sedgwick
When Horn's war party found the girl, she was hidden in the corner of the cave, undressed, and past comforting by the wolves who raised her. They had been slaughtered by the Lawspeaker's band or else run off, howling their rage and loneliness. A foundling, surely, filthy, perhaps seven or eight summers old. Horn, the Lawspeaker, growled that she should not join the Storn tribe. A worthless child... another mouth to feed in starving times.
The Rumpelstiltskin Problem by Vivian Vande Velde
What's wrong with this story:
A father tells the authorities his daughter can do impossible things AND the authorities believe him.
A soon-to-be bride promises to give her future baby away to a TROLL.
Said bride agrees to marry the man who's threatened to kill her if she can't keep doing the impossible.
What would a troll do with a baby anyhow, and why would he give her all that spun gold for a tiny ring?
Why doesn't the heroine do ANYTHING to get herself out of this predicament?!
The standing stones of Salisbury plain, once a Neolithic gathering place of star watching and blood sacrifice, is eerie enough by moonlight. But something roams the jagged countryside, hiding from the sunlit world.
The Doom Stone by Paul Zindel
It is a great thing to have a truly cool aunt. Think real-world Indiana Jones, and you have Jackson's Aunt Sarah. On any given summer break, she might be found in any part of the world, excavating fossils of long ago hominids. Last spring break it had been Ethiopia. They'd slept in hammocks in the jungle to keep out of reach of the giant rats that prowled below.