Both you and the post I replied to seem to imply that fiction books without any deeper meaning cannot be good or great.
They can be good or great entertainment, but that's not what is generally meant when educated people say that a book is great literature. The artistic value of a book is almost independent of how entertaining it might be.
(I say "almost independent" because people who care about the "deeper meaning" get great pleasure from taking their time to discover it.)
This is not what I meant to imply. While I prefer heavier reads, my point was that a cursory reading of any piece of literature pretty rarely results in a full consumption of it. The Great Gatsby is a pretty easy read, too, but it is steeped in symbolism that would be tough to fully interpret in a cursory read. Complexity != Quality
I think that the best books, including fiction, are ones that I find myself reflecting on later. Sometimes years later. I don't find that airport mysteries do that for me.
Although, sometimes I read those and enjoy them, mostly in an airport. No harm done.
They can be good or great entertainment, but that's not what is generally meant when educated people say that a book is great literature. The artistic value of a book is almost independent of how entertaining it might be.
(I say "almost independent" because people who care about the "deeper meaning" get great pleasure from taking their time to discover it.)