Besides, with an age of only ten years, the young detectives are considerably younger than in the current episodes of the original series. In some of their cases, the boys are supported by Alfred Hitchcockthe chauffeur Worthington, and the police inspectors Reynolds and Cotta. Bob's leg brace is removed between the end of Whispering Mummy and the beginning of Green Ghost. In the later Crimebusters series, it was stated once that the Three Investigators team was initiated when the boys were Nearly books have been published by now.
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. Jupiter's past acting ability benefits him frequently in mysteries because he can act older than he is, perform imitations of people when necessary and act less intelligent to extract information from potential suspects. Besides, with an age of only ten years, the young detectives are considerably younger than in the current episodes of the original series. All in all, this would result in a canon of books 6 books per year, 3 during spring and 3 during autumn and radio dramas published as of September In total, the radio dramas have sold more than 45 million copies and the books about 16 million copies in Germany Random House has reprinted several of the original books as two paperback reprint series, partly to assure their legal rights. At the end of , Random House and Kosmos signed an extensive agreement to transfer all rights to the other American novels not written by Arthur to Kosmos Verlag.