A Guide to the Americans with Disabilities Act Accessibility Guidelines, written by the US Access Board (PDF). ADA Build it Right Edition including CD with PDF version of the 1998 manual. The ADAAG Manual explains some of the basic considerations for accessible design and clarifies specific ADAAG provisions in an effort to address frequently asked questions. It is important to use this interpretative manual with the ADAAG specification documents since it does not address or reprint all information in ADAAG.