This specific project is not in the book, so below, I'll show how I made it. First, I cut the skirt off this vintage baby (or doll?) dress, opened it and pressed it flat. (I forgot to take a picture while it was intact, so here's the top.)
Sew three panels together as shown below. Cover one end of a 6" zipper with a tab. Sew the zipper along one long edge of a diamond. (You could do this sewing by machine, but I did it by hand for consistency with the next seam.) It's much easier to sew if the zipper is open.
To attach the zipper to the opposite side, it quickly becomes obvious that you must open it to sew.
Here's the zipper and tab in position, with the bag upside down.
Sew up the remaining edges.
Add a button and, if you like, a bangle (this one is part of a set from Target that cost bupkes.) I was a little indecisive about the button - I loved the vintage leather button in the photo on top of this page, but I also loved the yellow button below. You can sew on the button and bangle at the same time, or separately if your giftee might prefer a zip-up case to a wristlet.