Start with high-confidence war of 1812 books, then narrow by subgenre or adjacent topics.
An Illustrated Encyclopedia: Uniforms of the Napoleonic Wars
Digby Smith
Flags of the Napoleonic Wars (1)
Terence Wise
The Napoleonic Wars (3)
Gregory Fremont-Barnes
The Napoleonic Wars (4)
Armies of the War of 1812
Gabriele Esposito
