Stevenson's agile line, inimitable wit, and child appeal are undiminished as Grandpa and his little brother Wainey argue their way through still another hilarious cartoon reconstruction of their extraordinary youth, contradicting each other on every detail (``that was not a cave,'' corrects Uncle Wainey, ``It was an iguana's mouth'') of a tall-tale adventure involving a landslide, a volcano, and ice cream for dessert.~(Picture book. 4-9)