I've tried all kinds of bindings for felted books, but this simple form seems to work the best: three folded pages stitched to a wraparound cover. You will want to try to get the folded pages as close together as possible, but your sewing machine may dictate just how close that is. You can also sew the pieces to the cover by hand. In the photo you can see a pearl-headed pin temporarily marking the center sewing line. Even after it is completely sewn the pages may spring open in this little book. Two pearl-headed pins for closures resolve this issue, now this cactus-themed book is its own pin cushion. For a book that always stays closed try making a book with a landscape or horizontal format.
Cactus Couple, 2012
"Their relationship was prickly soft"
Comments
After poking around for advice, the precautions I was able to come up with are:
1. Seal each color airtight in a separate gallon Ziploc bag. (Color isn't the issue. Air is.)
2. Store bags in a plastic bin with an airtight lid.
3. Keep a sachet of cloves or cinnamon with the wool. I read that moths don't like strong smells (camphor, processed camphor in the form of moth balls, or cedar are other possibilities).
4. Someone also suggested putting bags in a hot car (in summer, one would assume) or some other hot place which is supposed to kill off the eggs.
Air, heat, strong smell. So far, these have been working. Good luck!