|Jonkers was founded in 1991 by Christiaan Jonkers, and specialized in the first editions of twentieth century literature. The company grew rapidly and in 1998 merged with Sam Jonkers' (then Johnstone) Bromlea Books, which was based in the north of England and specialized in childrens' and illustrated books. The Henley showroom was opened in late 1998 and the scope was extended to include nineteenth century literature, literary sets and fine bindings, as well as Thames topography and important general books.
||Throughout, Jonkers' principle has been simple: to handle only the very best copies available in each field. Before any book goes on sale it is meticulously checked for any defects and collated to ensure every plate is present and perfect. It is then carefully researched to take into consideration its rarity, condition and historical importance. With this information it is priced and catalogued to note all the elements of the collation and research. All books are unconditionally guaranteed to be authentic and as described.