I have added the APEX.png file provided by Greg in place of the hyperbolic paraboloid that was there before.
Note that I can also do the following: for the title of the book, I can change
<title>APEX Calculus</title>
to
<title><m>\apex</m> Calculus</title>
which makes use of the fact that we have a LaTeX definition for the APEX logo.
This works fine in HTML. Maybe not EPUB?
The APEX Calculus.png banner would look nice on the title page but the PreTeXt schema doesn't allow for an image anywhere on the title page, as far as I can tell.
One thing we are missing is a book cover. I know that the covers used by Greg in the past were pretty minimalist.
(Essentially the APEX banner on a solid background.)
Any interest in updating that? Maybe Greg could find a nice photo of VMI, we drop that in a border on a solid background, and add the banner at the top?