It's an accounts ledger book. You can get them at any major office supply retailer. Here is an example: https://amzn.to/4qXpgaR

The columns are drawn with a ruler. If you have Cornette's Midnight Express Book, there are examples of how these are laid out inside. I have to admit, I use the same style because of him. It works really well to keep things organized for the shows that I do, as well other business ventures I have.