You may not want to hear about it, but thousands of people live with the memory of their loved ones dying an excruciating and undeserved death every single day. Think about that.
Lethal injection is much too kind.
He should be strapped down in the biggest building we can find that is slated for demolition and blown to bits. Every copy of that book should be thrown in with him. And I could deal with hearing about it for as long as it takes. Send him straight back to Hell.