Plus, he's very much 8 years old and likes pictures!
fyi - we checked out the Complete Illustrated Brief History of Time Updated and Expanded Edition. The illustrations are quite good, but it's a lot harder to follow and I think DS7 may have run out of steam on that one. I don't know why he says he hates fiction, when he loves stories like Stuart Little. Maybe because he feels they're trying to simplify his beloved science. In any event, I'm trying George's again tonight.
ps - Have you seen The Invention of Hugo Cabret by Brian Selznick? It's an absolutely gorgeous book - the size of Harry Potter but mostly two full page illustrations with some text. That will be DS's first chapter book. Just bought it and it looks fascinating.