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.

A terrifying message from Alfred HitchcockMystery lovers, beware! In this book about the new adventures of the Three Investigators, get ready to face the horror that will even MY blood runs cold! I shudder just thinking about it. How, can more than one thing happen in this world... But no, I am not able to utter the terrible words! Instead, I will try to talk about other details of this dramatic story. A simple trip to the famous amusement park turned into a nightmare that instantly challenged the strength and abilities of the young detectives. Danger and confusion await them at every turn as brave souls try to find the solution to the devil's crime. Kidnappers! Encrypted notes! International scandal! Evidence hidden under the very noses of our heroes! Deadly mistakes! The intricacy of the search for a runaway boy! An enemy who almost penetrated the headquarters of the detectives themselves! Even our young detectives are almost unable to withstand this. This case requires the intelligence and prudence of ALL our boys. Possessing a brilliant mind, but, unfortunately, a little thick, Jupiter Jones, who unknowingly became the target of criminals, is not able to fully lead the trio of detectives. So tall, muscular Pete Crenshaw had to overcome his misplaced shyness and take on the role of boss. And Bob Andrews, the most hardworking and inquisitive of the trio, gets the chance to prove that he is as smart as he is reliable. From their headquarters in an abandoned trailer at Jones Salvage Yard - the Used Items Yard - to the Mexican border, the boys are pursued and persecuted, and finally they find the answer... but I still won’t talk about the unexpected solution that awaits you at the end of the book, too monstrous to think about! Try to discover it yourself. Forward to mysteries and adventures!

Alfred Hitchcock