I made covers for my scriptures - and a tote bag as well. I dont' have a tutorial - didn't take pictures along the way and don't really have a solid technique yet. I made both a little differently - still trying to find a good method. If you want to make one, just measure the book, add a little for the seam allowances and then add about 6 inches to the width so it covers over to the inside to make the flap. My problem is with the velcro closure - that makes it tricky trying to get a good technique. If I didn't do a closure, it would be very simple to make - but of course, I don't want to do anything the easy way :) By the time I figure out how I want to make it, I'll have a few sets - enough to match different outfits for church!
Next, I needed a tote bag, but didn't have an extra placemat, and the kids were taking naps, so I couldn't run to the store. But then I thought . . . "I have a ton of fabric and can measure one of my kitchen placemats to get the dimensions and make one from scratch." Since it wasn't a placemat with finished edges, I had to make a lining. So I basically made one of my placemat totes from this post. And then I paired it with this post's technique on making a bag with a lining.