Early in 1987, Pierian Press published the first volume of an annual publication, Book of Days. Book of Days is an encyclopedic collection of 435 resource guides—pathfinders—most of which were compiled by subject authorities and other professionals with strong research skills. The guides include an introductory text that provides major details concerning the subject. This is followed by citations of: reference works; books for adults, young adults, and children; feature films, other audiovisual resources, and recordings; project and discussion topics; cross‐reference dates related to the subject; and other supporting information.