An outstanding lot of five essential reference books for the early recorded sound enthusiast, focusing heavily on Thomas Edison's phonographs, cylinder records, and disc artists. This specialized collection includes Edison Disc Artists and Records 1910–1929 (Second Edition) by R. Dethlefson, Edison Amberol Cylinders by Allan Sutton, Edison Cylinder Records 1889–1912 (Second Edition) by Allen Koenigsberg, a blue-cloth edition of Edison Blue Amberol Recordings, and a rare, limited-edition Thai society publication titled Antique Phonograph & Gramophone: The Legend of Science and Art by Pluethipol Prachumphol, which features a personal inscription to noted phonograph historian Allen Koenigsberg. These softcover and hardcover reference volumes are invaluable for identifying and cataloging early 20th-century audio history. The books show minor shelf wear, light corner bumping, and typical age toning to the pages, but remain tightly bound and clean overall. Stacked: H 4.25", W 11", D 9". See photos for condition.