Early English Books Online contains over 125,000 titles listed in Pollard's and Redgrave's Short-Title Catalogue (1475-1640), Wing's Short-Title Catalogue (1641-1700), and the Thomason Tracts (1640-1661). Coverage includes the first book printed in English by William Caxton and features works by Malory, Bacon, More, Erasmus, Boyle, Newton, and Galileo. Novels, prayer books, pamphlets, almanacs, calendars, and many other types of primary sources are included. The works are presented as images that can be viewed online or downloaded in PDF format for viewing off-line.