A LaTeX document class for books that is tailored to the design of American Mathematical Society publications. If you have a standard installation of LaTeX, you should find that amsbook is already present because it is included in the AMS-LaTeX distribution. For publication-specific AMS document classes (surv-l.cls, memo-l.cls, mmono-l.cls, gsm-l.cls, stml-l.cls, etc.), see http://www.ams.org/tex/author-info.html. The author is American Mathematical. See also amslatex.