My Secret Unicorn: A Special Friend - Linda Chapman

Most of the time, Twilight looks like an ordinary grey pony but when Lauren says the words of a spell he transforms into a magical unicorn and together they can fly all over the world . . .Lauren is almost sure that Moonshine is another secret unicorn who needs someone special to turn her into her magical shape. Feeling sorry for the lonely pony, Lauren pays her a visit and is surprised to see a strange boy nearby. Lauren discovers that Michael longs to have a pony of his own. Could he be the special friend that Moonshine needs to become a unicorn?