Hoffmann's Magic Trilogy Books
by Professor Hoffmann
pen name for Reverend Angelo John Lewis

Modern Magic
(David McKay Co., Philadelphia, PA, undated circa 1910, 8 by 6 inches, 563 pages)

More Magic
(David McKay Co., Philadelphia, PA,
undated, circa 1920, 7.9" x 5.75", 457 pages)

Later Magic
(undated, circa 1920)

Called the "Magic Trilogy" in the Findlay and Sawyer book, unlike the 1893 Hoffmann book, they are about magic (but also fun reading for puzzle enthusiasts). Modern Magic is the most published of the three on the left below is the dust cover from a circa 1920's edition and on the right the cover of a 1978 soft-cover edition: