Part of the popular Flashlight Glossy series, this set includes the following books 11. While the Clock Ticked 12. Footprints Under the Window 13. The Mark on the Door 14. The Hidden Harbor Mystery 15. The Sinister Signpost 16. A Figure in Hiding 17. The Secret Warning 18. The Twisted Claw 19. The Disappearing Floor 20. The Mystery of the Flying Express
