Lauren's pony Twilight changes into a unicorn when she whispers the magic words. The only catch is that Lauren has to keep it a secret or she could put Twilight in great danger. When Lauren's friend Tilly runs away, she and Twilight know they can help. But they need unicorn magic to find her. Will they be able to rescue Tilly without the news of Twilight's hidden powers getting out?Chapman, Linda is the author of 'Flying High ', published 2006 under ISBN 9780439813846 and ISBN 0439813840.