In addition to journals and monographs, the MLA Bibliography annually indexes approximately 1,200 “essay collections,” books of articles or Festschriften containing independent scholarship by multiple authors. Relevant articles in each volume are also indexed, providing more than 20,000 records yearly. To aid librarians in their collection-development efforts, the bibliography staff provides the following Excel spreadsheets containing a listing of the titles, authors, publishers, series, and ISBNs available in each file update. These spreadsheets are identified by update number—YYYYUU. YYYY indicates the file year and UU the sequential number.