Such a smart idea (feed old book pages through a printer to make unique silhouette art). Not gonna lie, I'd probably scan in the old book pages first, and use the scan for the final print. I love my old books, I don't want to cut them up.
If youre a die-hard bookworm, then you probably cringe at the idea of throwing away old books even if your bookshelf has reached maximum capacity. Heres a solution: upcycle them into things you want to keep around the house, like jewelry, furniture,
Create gift bags from old book pages. Stamp a bird design on an old book page which has been cut 1 to 2 inches shorter than a second page. Sew or glue edges together. Secure with a brad or decorative button and small Velcro dots.