Request #522 From Gopper

Hello, I am a teenager from Hawaii. For a while now, I’ve been looking for a strange book that I read when I was in 6th grade. I cannot recall what the book was specifically about, but from what I remember of it, the book had a sort of science-fiction theme, and the cover had a depiction of santa in an aloha (?) shirt, riding in the cockpit of a space ship. I also remember that the beginning of the book had a link to a website that I only assume was defunct. I believe that the book might’ve been published between the late 1990s to early 2000s.