initiated when the boys were 13. The investigators were typically introduced to a mystery by a client or by finding something unusual accidentally in the junkyard of Jupiter's Uncle Titus Jones and Aunt Mathilda, who had a salvage business. The boys encountered baffling, sometimes misleading clues and danger before finally solving the mystery. The series had one major theme: however strange, mystical, or even supernatural a particular phenomenon may seem at first, it is capable of being traced to human agency with the determined application of reason and logic. This theme was compromised on four occasions by Carey: in The Mystery of Monster Mountain, the boys encounter Bigfoot; in The Invisible Dog, she canonizes astral projection and dangles the possibility of a "phantom priest"; in The Mystery of the Scar-Faced Beggar, a woman has genuine prophetic dreams; and in the final book of the original run, The Mystery of the Cranky Collector, a young woman's ghost returns to haunt her former employer's mansion. Most mysteries were solved by Jupiter Jones, a supreme logician who implicitly used the Occam's Razor principle: that the simplest and most rational explanation should be preferred to an explanation which requires additional assumptions. The boys were able to solve their mysteries with relatively few resources: they generally had little more than a telephone, bicycles, access to a library and—with reference to the Hollywood setting of the series—a chauffeur-driven Rolls-Royce (which Jupiter wins the use of in the first book). In the first book, The Secret of Terror Castle, Jupiter bluffs his way into the office of director Alfred Hitchcock and makes a deal with him that if the Investigators can find him a haunted house to use as a location for his next movie, Hitchcock will introduce the story of their adventures. Hitchcock agrees, not expecting them to succeed; but at the end of the book is impressed with the boys' investigation and not only introduces the book but also refers several other future clients to them in subsequent novels. The last chapter of each book was usually an epilogue in which the investigators sat with Alfred Hitchcock (and later, Hector Sebastian), reviewing the mystery and revealing the deductions through the clues discussed earlier in the book. In 1989, Random House revamped the series, naming it The 3 Investigators—Crimebusters Series. The investigators were now 17 years old, could drive cars and be much more independent. The