A series of books, compiled by Matthew Balent, that explore historical weapons and war equipement throughout various cultures. These books are made to be used by any fantasy or historical roleplaying system.
This series started with Turtle Press' Weapons, by Matthew Balent.
Then, moving to Palladium, Balent published The Palladium Book of Weapons & Armour and The Palladium Book of Weapons & Castles.
The Palladium Book of Weapons and Assassins and The Palladium Book of Weapons and Castles of the Orient followed, and to cap it all off, Palladium published The Compendium of Weapons, Armour & Castles, which contains information published in all the previous volumes of the series.