The book is Green Rider, by Kristen Britain. From what I can gather, this is set in a stereotypical medieval-type world. From the back flap:
On her long journey home from school after a fight which will surely lead to her expulsion, Karigan G'ladheon ponders her future as she trudges through the immense forest called Green Cloak.Lookie, lookie, we even an apostrophed name - will wonders never cease! ;-) However, as I haven't read the book, I won't pass judgement. Yet. ::cue for evil, manaical laughter::
So we have Karigan going through the forest (I'm guessing she's a teenager, as it references school in the back flap), and she senses some sort of ferocious animal headed her way:
She hadn't a weapon with which to fend off the beast, and she couldn't run either; - pg. 7, Green Rider, Kristen BritainWhat happens? Does she try to move behind a tree or a boulder or something? Does the beast suddenly show itself before she has further time to think? If it does, what does the beast look like? Let your imagination flow; it doesn't have to be like any animal on Earth.