Book excerpt: Once nearly as ubiquitous as dictionaries and cookbooks are today, letter-writing manuals and their predecessors served to instruct individuals not only on the art of letter composition but also, in effect, on personal conduct. Poster and Mitchell contend that the study of letter-writing theory, which bridges rhetorical theory and grammatical studies, represents an emerging discipline in need of definition. In this volume, they gather the contributions of eleven experts to sketch the contours of epistolary theory and collect the historic and bibliographic materials - from Isocrates to email - that form the basis for its study.