This is one of those designs you can't believe you hadn't thought of. A bookshelf with a built-in bookend? But of course!
This is the Hold Me Tight, a cute name for a cute shelf. It's basically as simple as it looks — a block bookend is mounted to a track and can be moved along the shelf and secured using the oversize wingnut underneath. Colleen & Eric, you're brilliant.
View more photos here.
Money: Not yet in mass production
Materials: 41"L x 11"H x 8"D
Measurements: Beech, walnut, or oak shelf; aluminum block and wingnut