OK, here are some shots of the DIY softbox and some explaination....
This is the set up for the book shot with a ceiling bounced fill light added so you can see it.
This is an overview of the softbox, which is made from the cardboard from a shipment of prints from by good friends at White House Custom Color, some electrical tape and a piece of white sheet.
And a somewhat inside view showing the aluminum foil I used to get the most light output I could.
The hole fits over the front of the flash with a little additional tape to hold it level, which I did not worry about in the book shot. I intend to make a prettier one in the near future with some modifications in the design.
Things that will change in the next build...
Thinner cardboard, maybe even heavy card stock.
Painted inside so it doesn't tear so much.
Better attachment to flash.
Foldable.