A Mighty Fortress (novel)

A Mighty Fortress
Cover of A Mighty Fortress
AuthorDavid Weber
Cover artistStephen Youll
LanguageEnglish
GenreScience fiction
PublisherTor Books
Publication date
April 13, 2010
Publication placeUnited States
Media typePrint (Hardcover)
Pages720
ISBN0-7653-1505-X
OCLC428027070
Preceded byBy Heresies Distressed 
Followed byHow Firm a Foundation 

A Mighty Fortress is a science fiction novel by American writer David Weber. The fourth book in the Safehold series, it was published by Tor Books on April 13, 2010. It debuted at #9 on the New York Times Bestseller List for hardcover fiction, following in the steps of previous titles in the series which also debuted on the list. The book dropped to #24 in the second week, then to #29 in week three before dropping off the list, for a total of three weeks on the list.

Preview chapters of the book were published before the book was released.

The title of A Mighty Fortress comes from Martin Luther's hymn "A Mighty Fortress Is Our God" (German, "Ein feste Burg ist unser Gott").