2013 - The Cryptos Conundrum (Paperback) → Hardcover ISBN-13: 9780765358486 ISBN-10: 0765358484 Genre: Mystery, Thriller & Suspense ? 2012 - The Cryptos Conundrum (Hardcover) → Paperback ISBN-13: 9780765318770 ISBN-10: 0765318776 Genres: Literature & Fiction, Mystery, Thriller & Suspense ? |