To make this book you will need:
A cover sturdy enough to sew through, ideally, thick leather.
Decorative thread, sturdier is better.
Text block, prepared to Longstitch method: four sewing stations, evenly spaced for an even pattern, or different if you're feeling adventurous. Pierce the leather with the same sewing stations.
Embellishments could be added where the stitches cross, or anywhere you like, really.