'Carrots' came to me in decent shape from a $1 sale, but the joints were torn and the textblock was solid be separated from the covers.
Here's the completed reback. After the endbands, the spine was lined with another layer of kozo paper, then linen, then paper. A new spine piece was fitted into the boards, new spine cloth was toned to match the existing cloth, then everything was slid, glued, and pressed together.
After allowing this volume to passively grace my music stand for several years, I decided it would be better appreciated by a pianist friend of mine, and so restored it to a usable state. The textblock was coming loose at the signatures and was almost completely separated from its case. I repaired the signatures, resewed and lined the textblock, then refit the textblock into the original case after lightly treating the spine leather to quell disintegration at the head and heel.