Norbert and Grog's adventures together, begun in Norbert Nipkin, continue! Scolded and scoffed at by their parents who refuse to believe that the pair have become friends, they set off alone to find and solve the final mystery of the Magic Riddle Stone. Humor and suspence combine to hold the reader spellbound until the adventure's dramatic conclusion. This edition includes a separate, new and never before printed illustration by the artist, Steve...