A wonderfully imaginative blend of "buddy book" with Edgar Allan Poe's "The Gold Bug,"complete with ghosties and ghoulies and big strong English bulldogs that go bump in thenight. Well, only one English bulldog, but there is plenty of Sinbad to go around. Throw insome highly inventive puzzles and code breaking, a hero who is smarter than he thinkshe is, a friend with a "million candlepower brain," and assorted bad guys of various levelsof toughness, and you have a thrilling, funny, int