Under the leadership of P.F. Collier and Son's President,
John G. Ryan, sales of ''Collier's Encyclopedia'' increased substantially during the 1950s, rising from 46,374 sets in 1953 to 110,688 sets in 1957. The vast majority of sales of ''Collier's Encyclopedia
were by a door-to-door sales force, and part of a combination sale that included other P.F. Collier and Son publications such as the 50-volume Harvard Classics, The Junior Classics, dictionaries, and atlases. However, Collier's Encyclopedia''s also enjoyed strong sales to schools and libraries. Since its 1875 founding, P.F. Collier and Son gave customers the option to pay for books over time. In-home encyclopedia purchasers typically paid for the books in small monthly payments over three years. In an era of heavy smoking, in the 1950s and 1960s, the cost of ''Collier's Encyclopedia
was equivalent to the cost of a pack a cigarettes a day. In 1962, the new 24-volume Collier's Encyclopedia'' was priced at $299.50, payable over 3 years, or at a daily cost of 27 cents. The average cost of a pack of cigarettes that year was also 27 cents. This was an affordable price for middle and low income families. For many families, owning a set of ''Collier's Encyclopedia'' became a
status symbol. P.F. Collier and Son had credit qualification standards for purchasers. In the 1950s, one of the qualifiers to determine if a family could afford the books was the presence of a telephone in the household. A company branch manager was required to phone the household to verify the details of each in-home sales order. ''Collier's Encyclopedia'' proved highly profitable for P.F. Collier and Son. In 1956, John G. Ryan reported a net profit of 20% on $25 million in sales revenue, an amount that kept P.F. Collier and Son's parent company, the
Crowell-Collier Publishing Company, solvent as it suffered huge losses from its failing magazine business. P.F. Collier and Son's profits from sales of ''Collier's Encyclopedia'' also funded Crowell Collier's expansion into radio stations and its 1960 purchase of the Macmillan publishing company. With his company's profits soaring, Ryan directed ''Collier's Encyclopedia
Editor-in-Chief William Terry Couch and P.F. Collier publications director Everett Fontaine to compile an expanded revision of Collier's Encyclopedia'' by 1962. The 24-volume 1962 edition of ''Collier's Encyclopedia
had an imposing list of contributors, embracing authorities from universities, professional societies, government, and industry. The articles were arranged to provide a simple explanation and basic facts followed by more detailed Information. The 1962 edition contained 6,000 new illustrations, many in color, and 1,450 maps, 150 in color. One of Collier's Encyclopedia''s strong features was its bibliography, which provided additional sources for further reading. Although work on the 1962 edition of ''Collier's Encyclopedia'' was authorized by P.F. Collier and Son's president John Ryan, and initiated by his editorial staff, the completed 1962 work was published by the parent company, Crowell Collier, which had merged with its P.F. Collier and Son subsidiary in December 1960, and assumed its former subsidiary's publishing and sales financing activities. In 1993, a French publisher,
Atlas Editions, a subsidiary of the Italian publishing giant
De Agostini, acquired ''Collier's Encyclopedia
from Macmillan Inc., the corporate name which Crowell Collier had assumed subsequent to its purchase and merger with Macmillan. Atlas Editions formed a sister company, Collier Newfield, to market Collier's Encyclopedia
. In 1997, Collier Newfield developed Collier's Encyclopedia 1998'', a three-disk CD-ROM multimedia version featuring 17 million words and over 18,000 photos and illustrations, 6 hours of audio, 85 minutes of audio, a dictionary, and maps. The 1997 24-volume ''Collier's Encyclopedia'' was to be the last print edition. The 1997 print edition extended to 19,900 pages. Bibliographies were found in the last volume, which also contained a 450,000 entry essential index. In 1998, Microsoft acquired the right to use ''Collier's Encyclopedia
content from Atlas Editions, which had by then absorbed Collier Newfield. Microsoft incorporated Collier's Encyclopedia's
content into its Encarta digital multimedia encyclopedia, which it marketed until 2009. Atlas Editions has retained the right to publish Collier's Encyclopedia'' in book form, a right that it has never exercised. == Kister's comparison ==