Includes: The Secret Panel The House on the Cliff The Mystery on the Spiral Bridge #45 The Pentagon Spy #61 Mystery of the Samurai Sword #60 Detective Handbook Small spot on one book where price tag was removed. Normal wear and tear. Copywright dates of 1946 and 1958. The Handbook, Spiral Bridge and Wanderer editions 1970s printings. Spiral Bridge has some wear on binding.