One of an innovative new series of linked stories designed to build reader confidence. One of an innovative new series of linked stories designed to build reader confidence. Nick Mack's best friend, Ellie, has a dog called Newton, whom she says is as much Nick's dog as hers. But Nick still wants a pet of his own. When Aunt Terri comes to visit, Nick finds a four-leaf clover in the park - and his good luck soon kicks in...Walker Stories support beginner readers making the transition from picture books in an engaging, entertaining and accessible way. Each title features three highly-illustrated, individual short stories linked by one character, so readers can build familiarity and confidence.