The Drum Leaf binding was developed by Tim Ely. It's an adhesive only structure (no sewing) that opens flat and can either make the spine fold an interesting feature or disappear, depending on what you want to happen. There is no sewing visible. Once the book block is made it is very similar to the sewn board binding and can be covered in many different ways. I'll use the break-away spine method for this video. I've been asked about drumming on the cover and pastedown. In the sewn-board binding Frost drums on materials wherever possible. This has some historical precedent and also produces a softer feeling board to the book. It has some aesthetic appeal. It does have cons. Imagine a heavy use library book made this way. The paper would wear on the edges of the boards and eventually split and the whole cover would peel off. Laminated materials are much stronger and stiffer, and this approach doesn't have that.