Hardy Boys Set - Books 21-30;

Part of the popular Flashlight Glossy series, this set includes the following books 21. The Clue of the Broken Blade 22. The Flickering Torch Mystery 23. The Melted Coins 24. The Short-Wave Mystery 25. The Secret Panel 26. The Phantom Freighter 27. The Secret of Skull Mountain 28. The Sign of the Crooked Arrow 29. The Secret of the Lost Tunnel 30. The Wailing Siren Mystery