Editing Lest Darkness Fall (section)

{{Short description|1941 novel by L. Sprague de Camp}}
{{Further|Gothic War (535–554)}}
{{Use mdy dates|date=March 2025}}
{{Infobox book
| name                 = Lest Darkness Fall
| title_orig           = 
| translator           = 
| image                = Lest darkness fall holt.jpg
| caption              = Dust cover of first edition
| author               = [[L. Sprague de Camp]]
| illustrator          = 
| cover_artist         = S. M. Adler and H. Lubalin
| country              = United States
| language             = English
| series               = 
| genre                = [[Alternate history]]
| publisher            = [[Henry Holt and Company]]
| release_date         = 1941
| english_release_date =
| media_type           = Print (hardback)
| pages                = 379
| preceded_by          = 
| followed_by          = 
}}

'''''Lest Darkness Fall''''' is a 1939 [[alternate history]] [[science fiction]] novel by the American author [[L. Sprague de Camp]].  ''Lest Darkness Fall'' is similar in concept to [[Mark Twain]]'s ''[[A Connecticut Yankee in King Arthur's Court]]'', but the treatment is very different.

The later alternate history author [[Harry Turtledove]] has said it sparked his interest in the genre as well as his desire to study [[Byzantine Empire|Byzantine]] history.<ref name="interviewHT">{{cite web|url=http://www.sfsite.com/09a/saht207.htm|title=A Moment in Time&nbsp;– An Interview with Harry Turtledove|last=Auden|first=Sandy|year= 2005|publisher=SF Site|access-date=17 March 2010}}</ref>