Bunkobon
In Japan, bunkobon are small-format paperback books, designed to be affordable and space saving.
The great majority of bunkobon are A6 in size. They are sometimes illustrated and usually have a dust wrapper over a plain cover.
They are used for similar purposes as Western mass market paperbacks: generally for cheaper editions of books which have already been published as hardbacks. However, they are typically printed on durable paper and durably bound, and some works are initially published in bunkobon format.
