This was an excellent book-binding class I attended last week. Luckily, being only one day, the tutor came with much of the book cover construction ready-done. It seems like cheating a bit but with such time constraints we needed to concentrate on learning the binding stitch. This is the first time I’ve done this chain stitch and only the second time I’ve stitched with two needles together (the first being with a Coptic binding, quite different to this).
The book consists of 4 signatures and two are stitched simultaneously. Signatures 1 & 2 are worked together, followed by 2 (for the second time) & 3, followed by 3 (for the second time) & 4. This forms the interlinking crossed and woven chain on the spine.
We also created a fastened return on the book cover and a book sleeve.
Very attractive new binding to add to my collection.
TactualTextiles 
Many thanks Claire! I’ve been down the online rabbit hole trying to figure out how to do this stitch 🙂
It creates a lovely book spine. I’m glad I was able to help.