Slow progress on my Stack of Books block (from "The Paper-Pieced Home" by Penny Layman) but progress nonetheless.
I wanted to add some hand stitching to the spine of the book in the final section so I tested some perle cotton threads first.
But the #8 perle cotton didn't work very well in actuality so I switched to 3-strand floss.
Much better. Borders are added and now it needs some quilting to be turned into a 16" pillow sham for the living room. I'm happy with it.