The Secrets of the Wailing CastleC.L. Holmes
Buku audio yang dinarasikan oleh Andy Stevenson
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- Gray Resurrection: A Tom Gray Novel Book 2Alan McDermott
- Gray Genesis: A Tom Gray PrequelAlan McDermott
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- Gray Retribution: A Tom Gray Novel Book 4Alan McDermott
- Gray Vengeance: A Tom Gray Novel Book 5Alan McDermott
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