Most Dover reprints are facsimiles by photo process of the originals, retaining the original pagination and typeset, sometimes with a new introduction. Dover will usually add new and more colorful cover art to its paper-bound editions. They re-title some books from the originals, to make them more in line with modern usage and categorization. For example, the book Woodward's National Architect was retitled by Dover as A Victorian Housebuilder's Guide.
Dover was influential in transforming the paperback book market. In 1951 they issued some of the earliest standard-sized paperbacks, a format that became known as a trade paperback. Since the 1960s, the vast majority of Dover's line has been paper-bound books of various sizes.
For a time, Dover also published a catalogue of LP phonograph records, at least some, such as selected recordings of Schubert solo and chamber works featuring pianist Friedrich Wührer, being reissues of earlier monaural releases from other labels. Noteworthy among Dover's original issues was an extensive series documenting pianist Beveridge Webster in literature ranging from Beethoven's Hammerklavier sonata to the second piano sonata by Roger Sessions. Dover's foray into recordings, however, was not as successful as its core business of book republication, and the company eventually abandoned it.
Starting in the 1990s Dover has published a specialized line of low-cost reprints of public domain literature known as "Dover Thrift Editions", which are generally priced at US$5 or less. They also have several lines of foreign language books.
Hayward Cirker died in 2000 at the age of 82. In the same year Dover Publications was acquired by Courier Corporation.