The book is hand stitched using coptic stitch, giving the impression of plaits across the spine of the book, which you will be able to see in the photo. The stitching is delicate, but strong. Coptic stitching was first used by Christians in Egypt (the Copts) between the 2nd and 11th centuries AD. This type of stitching allows the book to lay completely flat. It is worth noting that this also means there is some movement around the spine of the cover boards; however, this does not imply a weakness in the book! Without this movement, the book would not lay flat, so I never attempt to overcome this with glue or other methods.