The UK’s National Literacy Trust just launched its annual online auction, and one of the most awesome items up for bid is a copy of Slade House annotated by David Mitchell himself.

“I vandalised I mean annotated a SLADE HOUSE for a Literacy Trust auction, if anyone would like to support a worthy cause…” Mitchell tweeted on Feb. 21. “Comments/thoughts/ephemera are scribbled on many of the pages, like a DVD commentary you can’t shut up, or a demonic voice in the head…”

You can view two close-up photographs of the annotated copy — as well as place bids — via this link. As of about 1 p.m. Eastern Time, bidding has reached £1,525, which is about $1,900 in ‘Merican currency. There are six days left, so it’ll be interesting to see how high the bids climb and how much money is raised for the trust, which does some good work in schools and communities with low literacy rates.

If the bidding price is too steep, you can still donate directly to the trust here. And if you’re interested in learning more about Slade House, you can read about Mitchell’s influences in the horror genre, and watch him read a sample chapter from the book at New York’s 92nd St. Y in 2015.