Linda Chapman 
My Secret Unicorn: Dreams Come True [EPUB ebook] 

Lauren’s pony Twilight changes into a unicorn when she whispers the magic words, but Lauren must keep this a secret or it could put Twilight in great danger. Lauren’s friend, Mel, is teased by girls at school because her pony Shadow can’t jump. Shadow is afraid, so Lauren and Twilight visit him secretly and use Twilight’s unicorn magic to give Shadow the confidence to begin to overcome his fear. One night a powerful storm leaves Mel and Shadow trapped in a barn by a burning branch. Shadow is scared and can’t jump, but then he remembers Twilight’s help and is filled with bravery. With a magnificent jump, he soars over the burning branch carrying Mel to safety.