Some time ago I was approached about writing some entries for the newly released War and Religion: an encyclopedia of faith and conflict (ABC-CLIO, 2017). And I’m glad to share that it has now been published in three volumes.
My own humble contributions were (in alphabetical order) on the Fourth Crusade, the Knights Templar, the Sixth Crusade, and the Venetian Crusade. That last one was quite successful and does not get the attention it deserves, in my opinion.
Feel free to sample my own entries above and please do consider asking your institution’s library to acquire this valuable resource.