Book, in particular, in the form of an album comprises front and rear covers, a fold line and two slits for a passage of a book back strip folded in the form of a concertina element

摘要

The book, in particular, in the form of an album (1) comprises front and rear covers, a fold line (2) and two slits (3, 4) for a passage of a book back strip folded in the form of a concertina element. The same method with a locking element is used for fixing two adjacent paper sheets in such an album.