The "Alfred's Essential Dictionary of Music" is a pocket-sized reference book from the Essential Dictionary Ser. It serves as a practical and useful music dictionary for students and professionals, offering information on history, criticism, instruction, and study. Authored by L. C. Harnsberger, this Second Edition vintage dictionary is published by Alfred Music Company, Incorporated in the United States. With 336 pages, this mini dictionary features a compact size of 5.5 inches in length, making it a convenient resource for young adults and adults interested in music.