Not technically a DIY, but this is so beautiful and it shouldn't be that hard to figure out...
Pinwheel #4 - Digital - Quilts Complete - Continuous Line Quilting Patterns
Lets Go On An Adventure Moleskine Plain Notebook
• ❃ • ❋ • ❁ • tanglebucket • ✿ • ✽ • ❀ •: trash/treasure. tanglebucket.blogspot.com
For notebook covers… ie vintage pattern cover - embroider around the skirt or letters.
DIY: carnets moleskine brodés
Caterpillar Stitch - Caterpillar Binding by MissRuth, via Flickr