The Cats of Tanglewood Forest by Charles De Lint.
Little Brown, 2013. 9780316053570
Interest Level: Grades 5 and Up.
Lillian, out searching for fairies in the woods, is bitten by a venomous snake and she feels her life beginning to slip away. Her friends, the cats of the forest decide to use their most powerful magic to return her to life by transforming her into a kitten. Unhappy in that form, she must convince the old Possum-Witch to transform her back into a girl. Will Lillian learn that she must accept the consequences of her choices?