The fox and the kingfisher
Judith Mellecker
Unhappy with their father's plan to remarry, a brother and sister have their wishes fulfilled by a stableboy who knows magic and are turned into a fox and a kingfisher.

by Laura Bingham (2009)
While hiking in the hills behind their Pennsylvania home, teenaged twins Erin and Bain discover their magical abilities, enter a fantasy fairy world, and train to become elves.
Judith Mellecker
Unhappy with their father's plan to remarry, a brother and sister have their wishes fulfilled by a stableboy who knows magic and are turned into a fox and a kingfisher.
Andre Norton
An evil magician's enslavement of a peaceful valley is hampered by a woman driven into the forest as a child and raised to be a master magician herself.
Lynne Jonell
When Derek Willow is invited to visit a friend in the old neighborhood, he and his siblings Abner, Tate, and Celia try to earn money for his train ticket using an enchanted, and very hungry, lawnmower.
Matt Haig
Having been careful to heed his Aunt Eda's warnings to not enter the dangerous Shadow Forest , twelve-year-old Samuel Blink finds himself in a difficult situation when Troll-Son runs away from his Shadow Forest home to come and live with Samuel, his human hero.