Department manuals set forth standard operating procedures for federal agencies. These works can be helpful in providing a level of detail about policy implementation that would not be found elsewhere. Most manuals are available on both the agency's website and on Westlaw.
USCIS publishes the following manuals:
Publihsed by the Executive Office for Immigration Review (EOIR) to provide guidance to practioners appearing in immigration court.
Published by the Department of State.
Published by ICE.