Help to cheer up Worried Unicorn in this interactive 'Who's In Your Book?' story from bestselling children's book author Tom Fletcher - now available as a board book! WHOOSH! A unicorn has galloped right into your book - how exciting! But - oh dear! This Unicorn doesn't look very excited at all. In fact, he looks quite worried. Can you help to cheer him up? This brilliant story combines interactive fun with an important message about the power of friendship, and how helpful it can be to share your worries with others. Who's in Your Book? Interactive adventures for big imaginations