Glyn John Harper QSM (born 12 March 1958) is a New Zealand historian who specialises in the military history of the 20th century.

After completing a Master of Arts degree the following year with a thesis on the Fall of Singapore, he moved to Australia, teaching at Catholic schools in New South Wales.

He earned a Doctor of Philosophy in 2001 from the University of New England with a thesis on Howard Kippenberger, a New Zealand general of the Second World War.

[4] Harper was awarded a Fulbright Senior Scholarship in 2010 and carried out five months of research at the Virginia Military Institute and the US Army's War College on the Battle of Monte Cassino.

[7] As well as his non-fiction historical works for adults, Harper has written several children's picture books with military themes, including Le Quesnoy, Roly, the Anzac Donkey,[8] and Bobby the Littlest War Hero.