So what? Just take this back with you to 1985 and give it to your younger self. It'll be worth it. But someday a crazy wild-eyed guy who claims to be a scientist or a kid may show up asking about this book, just shoot them with a revolver.
buddy of mine is a general contractor. He used to play jokes on the greenpea's and give them a bucket and tell them to go get a bucket of steam to soak the rusty bolts in.