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Books about Code and cipher stories (sorted by popularity)
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https://sendtokindle.compellingsciencefiction.com/ebooks/42455.opds
The Mystery of the Sea
Bram Stoker
2024-09-20T04:33:17Z
https://sendtokindle.compellingsciencefiction.com/ebooks/69204.opds
The white cipher
Henry Leverage