Book cover of Room 40: British Naval Intelligence 1914-1918

Book description

Recounts World War I intelligence operations of the British, shows how broken German codes were used to help control the shipping lanes, and identifies the events in which Naval Intelligence played a key role

When you buy books, we may earn a commission that helps keep our lights on (or join the rebellion as a member).

Why read it?

1 author picked Room 40 as one of their favorite books. Why do they recommend it?

Good intelligence is the key to winning any war.

The work of Bletchley Park in the Second World War is well known. The equally important role that the enigmatically named Room 40 played in the First World War is less well known.

This book unravels the story of this formidable naval code breaking and intelligence unit. It was made up of men from all walks of life, under the leadership of the maverick genius and spymaster, Rear-Admiral ‘Blinker’ Hall.

Without the work of Room 40 there would have been no naval battles at Dogger Bank and Jutland. The U-Boat campaign…

If you love Room 40...

Book cover of These Blue Mountains

These Blue Mountains by Sarah Loudin Thomas,

A moving story of love, betrayal, and the enduring power of hope in the face of darkness.

German pianist Hedda Schlagel's world collapsed when her fiancé, Fritz, vanished after being sent to an enemy alien camp in the United States during the Great War. Fifteen years later, in 1932, Hedda…

Want books like Room 40?

Our community of 12,000+ authors has personally recommended 100 books like Room 40.

Browse books like Room 40

Book cover of From the Dreadnought to Scapa Flow, Volume I: The Road to War, 1904–1914
Book cover of The Last Gentleman of War: The Raider Exploits of the Cruiser Emden
Book cover of Dardanelles Patrol: The Incredible Story of the E.11

Share your top 3 reads of 2025!

And get a beautiful page showing off your 3 favorite reads.

1,340

readers submitted
so far, will you?

📚 If you like Room 40, you might also like...

Book cover of Foxfire in the Snow

Foxfire in the Snow by J.S. Fields,

It's a time of change, between magic and alchemy.

Born the heir of a master woodcutter in a queendom defined by guilds and matrilineal inheritance, nonbinary Sorin can’t quite seem to find their place. At seventeen, an opportunity to attend an alchemical guild fair and secure an apprenticeship with the…

Book cover of The Main Gate

The Main Gate by Yvonne Kjorlien,

Dr. Elise Marquette has spent years burying the past—until the past refuses to stay buried.

Hired to join Earth’s first interstellar contact team, she hopes the vastness of space will finally offer distance from the ghosts of war and the wounds left by a mother who never let her be…

5 book lists we think you will like!