Meet the princess who loves breaking the rules and her Royal Unicorn, who happens to be a pig! A madcap new 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. Unipiggle and Princess Pea are so excited to be on HOLIDAY! They can't wait to build sandcastles and explore the magical underwater town, Mermaid Springs. But then the King is swept away in a WHIRLPOOL. The mermaids think he has been taken by a mysterious undersea creature...who likes to BURP a lot. Can Unipiggle and Princess Pea brave the bubbles to find his secret lair and save the King? "Fizzing with imagination." Harriet Muncaster, author of Isadora Moon