Linda Chapman 
My Secret Unicorn: Friends Forever 

An exciting new adventure starring Lauren and her magical pony, Twilight. It »s the summer holidays and best friends Lauren and Mel are really excited about going to pony camp together. But when they get there they are surprised to find that they »re not in the same cabin. Mel soon makes lots of new friends and Lauren begins to feel rather lonely and left out. Still, there »s plenty of pony tasks to do and Lauren is glad she has Twilight to keep her busy. By the end of the week, Lauren begins to feel better, until she discovers that Mel »s team is planning to cheat in the Orienteering Cup competition. Lauren has to persuade Mel that her new friends are not as nice as they seem – and she needs some extra special Twilight magic to help her!