AI suggestions
❧

5 Books Found

❧

Based on your description:

"A nineteenth-century English historical thriller in London with an undercover hero, an unsuspecting businessman, a stolen cipher, a conspiracy to export the cipher to a foreign power, and a dramatic rescue during a severe maritime storm."

An AI model suggested these books. We look them up in public book catalogs. How we make these pages

September 19, 2026
✦

Recognize one of these? Tap This is it! to help confirm the match.

The Sign of Four
View on Open Library

The Sign of Four

Arthur Conan Doyle

1889
962 editions
The Riddle of the Sands
View on Open Library

The Riddle of the Sands

Erskine Childers

1903
532 editions
No Cover
View on Open Library

Riddle of the Sands

Erskine Childers

1903
147 editions
No Cover
View on Open Library

Riddle of the Sands

Erskine Erskine Childers

2016
15 editions
The Secret Agent
View on Open Library

The Secret Agent

Joseph Conrad

1907
335 editions
End of recommendations

Looking for a different book?

Start a new search

Got an eye for clues?

Try today's puzzle