aka "KWH"
"Whether you are brand new or a long-time member, the Known World Handbook is the quintessential, must-have compendium for anyone taking part in the SCA. It contains over 80 articles on a wide range of topics."
The Known World Handbook is available directly from the SCA Publications or at larger events on Merchants' Row.
A highly recommended resource for newcomers to the SCA, full of useful tips and information. The KWH is written for the SCA worldwide.