Meet the princess who loves breaking the rules and her Royal Unicorn, who happens to be a pig!A madcap and much-loved adventure series for 6-8 year olds, perfectly bridging the gap from picture books to chapter books, from award-winning author-illustrator Hannah Shaw, filled with pictures in all the colours of the rainbow and interactive extra material. Princess Pea and Unipiggle are thrilled when it snows! They can't wait to party at the Twinkleland Palace Snow Ball. But the Festive Fairies haven't delivered their usual sparkle and cheer across the kingdom. And without it, the Snow Ball can't go ahead. Where could the fairies be? It's up to Princess Pea and Unipiggle to find out and save the Snow Ball!