This is one of my favorite notebooks.
The Hand*Book Journal Co. blank books are beautiful. They are covered in hardback book cloth with blank pages inside. The paper is heavier weight and toothier than a standard Moleskine (and much cheaper) and available in a square 5×5 size, as well as more traditional 3×5 and 5×8-ish size. The elastic is a bit more substantial but the book mark is shorter than the Moleskine. They are produced by a local Kansas City company called Global Art Materials which makes me more inclined to support the local guys! I wish they had a shop in town. I’d love to buy directly from them.
Highly recommended. Available in all sizes on Amazon.