The Holy War Made by King Shaddai Upon Diabolus, to Regain the Metropolis of the World, Or, The Losing and Taking Again of the Town of Mansoul is a 1682 novel by John Bunyan.

Regarded as one of the early modern English novel written in the form of an allegory, it tells the story of the residents in a town called "Mansoul" (Man's soul).

During Diabolus' reign on Mansoul, Shaddai, seeking to restore his kingship, sends his son Emmanuel to reclaim it.

[6] Interest in The Holy War revived during the 18th century,[7] although the text suffered at the hands of its editors, who were inclined to bring its ideas into a line with the prevailing theological climate.

[6] In 1854, Thomas Babington Macaulay asserted that The Holy War was "the second-greatest allegory ever written, surpassed only by The Pilgrim's Progress.