Back when the EarthBound LoL book was first released, we offered to sign books if people asked. I liked to do personalized messages and one person used that to dare me into signing a piece of toilet paper rather than the book itself. Well I managed to sign the toilet paper after some trial and error learning.
Unfortunately it’s not as feasible to do personalized messages anymore. You can still get a signed copy of our books but they probably won’t have anything more than just our autographs and tiny drawings of things.