The three detectives are his young friends Bob Andrews, Pete Crenshaw and Jupiter Jones. They live in a town near Hollywood. Their stronghold is a salvage warehouse, their headquarters is an old caravan in which they have equipped a crime laboratory. Their agency "Three Detectives" reveals any secrets, riddles and puzzles. Friends-detectives boldly take on the most important and complicated cases and bring them to the end with honor. Three detectives and messages from the other world Doctor Arroway, an archaeologist and specialist in the field of the ancient Mayans, explores a mysterious tomb. The Mayan sacred book is the only clue. But the keys to the tomb are invisible! Three Rocky Beach detectives take on the case and try to solve the mystery. When a valuable book is unexpectedly stolen, it becomes clear that they are not the only ones on the trail of a Mayan tomb. Time matters - who will be the first to make the secret letter visible? Source: The text of the book was translated from the original language using an artificial intelligence program. For the most part, the translation of the text is of very high quality, but in some cases, due to the imperfection of the technology, there may be incorrect phrase translations in the text, as well as single words and expressions may not be translated.