A chapbook is an early type of popular literature printed in early modern Europe.
 Produced cheaply, chapbooks were commonly small, paper-covered booklets, usually printed on a single sheet folded into books of 8, 12, 16 and 24 pages.
 They were often illustrated with crude woodcuts, which sometimes bore no relation to the text.
 When illustrations were included in chapbooks, they were considered popular prints.
Turkish or Ottoman illumination covers non-figurative painted or drawn decorative art in books or on sheets in "muraqqa" or albums, as opposed to the figurative images of the Ottoman miniature.
 In Turkish it is called “tezhip”, meaning “ornamenting with gold”.
 It was a part of the Ottoman Book Arts together with the Ottoman miniature ("taswir"), calligraphy ("hat"), Islamic calligraphy, bookbinding ("cilt") and paper marbling ("ebru").
 In the Ottoman Empire, illuminated and illustrated manuscripts were commissioned by the Sultan or the administrators of the court.
 In Topkapi Palace, these manuscripts were created by the artists working in Nakkashane, the atelier of the miniature and illumination artists.
 Both religious and non-religious books could be illuminated.
 Also sheets for albums "levha" consisted of illuminated calligraphy ("hat") of "tughra", religious texts, verses from poems or proverbs, and purely decorative drawings.
The DRYAD Numeral Cipher/Authentication System (KTC 1400 D) is a simple, paper cryptographic system employed by the U.S. military for authentication and for encryption of short, numerical messages.
 Each unit with a radio is given a set of matching DRYAD code sheets.
 A single sheet is valid for a limited time (e.g. 6 hours), called a "cryptoperiod."
Chris Baldwin is a British performance director and curator, professor and writer, he has lived in northern Spain for 20 years.
 He develops site specific Performances and curated events devoted to specific city, rural or regional contexts.
 Baldwin's work emphasises the importance of a collaboration between professionals and citizens in the making and curating of cultural projects.
 He has various plays and Books published about theatre and the teaching of history in post authoritarian countries.
 Chris Baldwin directs widely including Spain, UK, Poland, Bulgaria and Germany.
 Baldwin worked for Rose Bruford College, 2012 Summer Olympics.
 He was Curator of Interdisciplinary Performance for the 2016 in Wroclaw, Poland and also works for the .
 Presently he is Creative Director for Galway 2020 <http://galway2020.ie/en/> European Capital of Culture.
The Fremantle Journal and General Advertiser was the first newspaper published in Western Australia.
 It was edited and published by James A. Gardner, with the first issues appearing less than a year after the establishment of the Swan River Colony in 1829.
 As there was not yet a printing press in the colony, each issue was handwritten.
 Only a single copy of a single issue survives.
 Held by the Battye Library in Perth, Western Australia, it is copy number 5 of the first issue, that of 27 February 1830.
 It consists of a single sheet, printed on both sides and folded in half, thus yielding four pages; it sold for one shilling and sixpence.
 It is not known when publication ceased, except that it had certainly concluded by the time Gardner left the colony in September that year.
The International Image Interoperability Framework (IIIF) defines several application programming interfaces that provide a standardised method of describing and delivering images over the web, as well as "presentation based metadata" (that is, structural metadata) about structured sequences of images.
 If institutions holding artworks, books, newspapers, manuscripts, maps, scrolls, single sheet collections, and archival materials provide IIIF endpoints for their content, any IIIF-compliant viewer or application can consume and display both the images and their structural and presentation metadata.
Merrymount Press was a printing press in Boston, Massachusetts, founded by Daniel Berkeley Updike in 1893.
 He was committed to creating books of superior quality and believed that books could be simply designed, yet beautiful.
 Upon his death in 1941, the Press was taken over by his partner John Bianchi, but ceased operations in 1949.
 Updike and his Merrymount Press left a lasting impression on the printing industry, and today Updike is considered one of the most distinguished printers of the twentieth century.
 Stanley Morison, the typographer responsible for creating the ubiquitous Times New Roman, had this to say of the Merrymount Press after Updike’s passing: “The essential qualities of the work of the Merrymount Press...may be said without exaggeration…to have reached a higher degree of quality and consistency than that of any other printing-house of its size, and period of operation, in America or Europe.”
A pamphlet is an unbound booklet (that is, without a hard cover or binding).
 It may consist of a single sheet of paper that is printed on both sides and folded in half, in thirds, or in fourths, called a "leaflet", or it may consist of a few pages that are folded in half and saddle stapled at the crease to make a simple book.
Blue Chip Stamps started as a trading stamps company called "Blue Chip Stamp Co." They were a competitor to S&H Green Stamps.
 Blue Chip stamps were a loyalty program for customers, similar to discount cards issued by pharmacies and grocery stores in the digital era.
 A customer making a purchase at a participating store (typically grocery stores, gasoline stations, and pharmacy chains) would be given stamps in proportion to the size of the purchase.
 The stamps would be issued by machines next to the cash register.
 The customer would paste the stamps (which could be licked or moistened with a sponge, like postage stamps) into books.
 The books could then be taken to a special redemption store and redeemed for merchandise, such as lawn furniture, dining tables, table ware, and many other items.
 The redemption stores did not keep a full inventory of items, but would order from a catalog on behalf of the customer.
A book is a set of sheets of paper, parchment, or similar materials that are fastened together to hinge at one side.
 A single sheet within a book is a leaf, and each side of a leaf is a page.
 Writing or images can be printed or drawn on a book's pages.
 An electronic image that is formatted to resemble a book on a computer screen, smartphone or e-reader device is known as an electronic book or e-book.

Question: What does the single sheet of Chris Baldwin books could be be called?
Answer: leaf