In an attempt to expand the use of public television programs, the Public Television Library, a department of the Public Broadcasting Service, began a program whereby 3/4-inch videocassettes were placed in a public library. The 3/4-inch videocassette resembled a book; the library was a traditional repository for reference material; thus the title "Have You Watched a Book Today?" or WATCHABOOK. The experiment was to be center in the Monroe (Indiana) County Public Library where 141 videocassettes were selected, but interest grew so rapidly that within two months the experiment had expanded to three additional libraries. Some of the conclusions of the experiment were that the technical reliability and versatility of the videocassette medium is a natural for use in a one-to-one environment in a service oriented organization; the videocassette concept is valuable in introducing library patrons to new library audiovisual services and is particularly helpful in capturing the attention of young patrons; single programs, those in color and of half-hour length with strong local identification, are the most valuable; the videocassette concept is helpful in attracting new minority patrons to a library; and the experiment was a rewarding success for all involved. A list of programs and a user questionnaire are appended. (KKC)