One of my favorite books as you can see by the well worn wrapper.
In case anyone is wondering how these works on paper are on cradled hardboard... this is what I do: I coat the face of the panel and the back of a sheet of watercolor paper cut slightly larger than the board with acrylic medium. I put the "jelly" sides together, put a clean sheet of paper on top, use a brayer to make sure contact is complete, and then clamp another panel on top until it's dry. I then trim off the excess paper and I'm good to go!
Oh, all works on paper applied to the board are sealed with an Aquarelle spray that protects them, provides a UV block and negates the need for glazing.