there´s 2 different types of headcovers on those images: on the first one it looks like a cowl, covering head, neck and chest, the second is a cap strapped under the chin... which one would you prefer? ----anyway, i could make them for you.

an a simple letter like that  "F" is done in a couple of minutes.

although i do not know the books, i am sure it is a very nice project and i´d be happy to help...

A.