I had this idea I can't get to leave me alone so I thought I'd ask here. I use a Hobonichi Techo, and a year or so ago I finally added the Page Keeper to my annual order. As in the image description, a page keeper goes into a pocket of your planner's back page and the elastic slips over the current day's bottom corner, acting as a bookmark you never have to remove.
Naturally what I now want is this but for books. Does anyone know of any bookmarks that would work like this? I found one or two but they go totally vertically over the page and I don't think it would be terribly convenient to pull each page out from under that. I'm sure they're designed to be off the pages while you're reading but in a perfect world that's not what I'm looking for.
I'm wondering if I can just use a large page keeper, but I don't think it would stay in the book all that well.