A control portion of an image forming apparatus creates an image list for performing the perfect-binding imposition of the images of the pages on the sheets so that the scores formed on the sheets are on the external surface of the center-folded sheets, for the sheets each having a size twice the size specified as each of the sheets on which the images of the book body are to be formed, when a book-body stacking portion accommodates the sheets center-folded by a folding portion along scores formed for every sheet from a predetermined direction by a scoring portion for each of the sheets having the images formed thereon by the image forming portion, and a bookbinding portion uses a glue-on cover to perform case binding of a bundle of the sheets glued to the side of the spine.

The instant invention provides a paper product providing the index cards in a binding. The instant invention provides the flexibility of individual index card for storage once the information is written on it. User has the option to tear the index card out of the note pad once the user finished writing the information on the index card, and the individual index card can be stored in a traditional index card box along with other index cards.

A bookbinding apparatus has: a first transport unit that transports a book along a first path; a gluing unit that glues the spine of the book transported along the first path; an attaching unit that attaches a cover to the spine of the glued book; a second transport unit that transports the book with the cover along a second path and discharges it to the transport apparatus; a book supply unit that supplies the book with the cover from the first path to the second path; and a casing accommodating the first transport unit, the gluing unit, the attaching unit, the second transport unit, and the book supply unit. The second path is longer than the distance between a position where the book is supplied from the book supply unit to the second path and a position where the book is discharged from the second path to the transport apparatus.