This allowed me to print my own graph paper in whatever color I choose.
I made softcover and hardcover versions. The softcover has a pocket in the back for storing notes, feathers, postcards, and whatever else you might find while out in the field.
If you're interested in purchasing one, I have a couple of the hardcovers left. They are 60.00 a piece. Contact me and I can send you images. I'll be making two, one softcover and hardcover, with pink graph paper soon too.