I had grown tired of forgetting all the great ideas that popped into my head for a second and left, so I reloved to always carry around paper so I could quickly jot down any spontanious ideas. The issue was, most books were either too big or the paper was too exposed so the pad would slowly get shredded as it josled around in my pocked all day. Insperation came from when I was at a stationery/notebook/pen store and saw a Travelers Notebook. I realized that a leather cover would protect the paper and the replaceable "cartridge" style of holding paper of the traveler's notebook would allow me to continually use the same cover without worrying about running out of paper. It's not shown in the pictures, but I carved out a section of graphite from a pencil to use as an ultra-slim writing device and put it in the book so now there's no chance I'll ever forget any ideas again.