Book collecting is the collecting of books, including seeking, locating, acquiring, organizing, cataloging, displaying, storing, and maintaining whatever books are of interest to a given individual collector. The love of books is bibliophilia, and someone who loves to read, admire, and collect books is a bibliophile.
Bibliophile book collecting is distinct from casual book ownership and the accumulation of books for reading. It can probably be said to have begun with the collections of illuminated manuscripts, both commissioned and second-hand, by the elites of Burgundy and France in particular, which became common in the 15th century. Duke Philip the Good of Burgundy appears to have had the largest private collection of his day, with about six hundred volumes. With the advent of printing with movable type books became considerably cheaper, and book collecting received a particular impetus in England and elsewhere during the Reformation when many monastic libraries were broken up, and their contents often destroyed. There was an English antiquarian reaction to Henry VIII's dissolution of the Monasteries. The commissioners of Edward VI plundered and stripped university, college, and monastic libraries, so to save books from being destroyed, those who could began to collect them.
Book collecting can be easy and inexpensive: there are millions of new and used books, and thousands of bookstores, including online booksellers like Abebooks, Alibris, Amazon, and Biblio.com. Only the wealthiest book collectors pursue the great rarities: the Gutenberg Bible and Shakespeare's First Folio are, for example, both famous and extremely valuable. Collectors of average means may collect works by a favorite author, first editions of modern authors, or books on a given subject. Book prices generally depend on the demand for a given book, the number of copies available, and their condition. There are associations that collectors may join. The Fine Press Book Association is aimed at collectors of modern fine printing, and produces its journal, Parenthesis, twice a year. The Private Libraries Association covers modern fine printing too, but is much more general in its outlook and produces a quarterly journal, the Private Library.