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Order of Kay Tracey Books
| The Secret of the Red Scarf | (1934) | Hardcover Paperback Kindle |
| The Strange Echo | (1934) | Hardcover Paperback Kindle |
| The Mystery of the Swaying Curtains | (1935) | Hardcover Paperback Kindle |
| The Shadow on the Door | (1935) | Hardcover Paperback Kindle |
| The Six Fingered Glove Mystery | (1936) | Hardcover Paperback Kindle |
| The Green Cameo Mystery | (1936) | Hardcover Paperback Kindle |
| The Secret at the Windmill | (1937) | Hardcover Paperback Kindle |
| Beneath the Crimson Brier Bush | (1937) | Hardcover Paperback Kindle |
| The Message in the Sand Dunes | (1938) | Hardcover Paperback Kindle |
| The Murmuring Portrait | (1938) | Hardcover Paperback Kindle |
| When the Key Turned | (1939) | Hardcover Paperback Kindle |
| In the Sunken Garden | (1939) | Hardcover Paperback Kindle |
| The Forbidden Tower | (1940) | Hardcover Paperback Kindle |
| The Sacred Feather | (1940) | Hardcover Paperback Kindle |
| The Lone Footprint | (1941) | Hardcover Paperback Kindle |
| The Double Disguise | (1941) | Hardcover Paperback Kindle |
| The Mansion of Secrets | (1942) | Hardcover Paperback Kindle |
| The Mysterious Neighbors | (1942) | Hardcover Paperback Kindle |
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