His is a ‘ rapture’ kind of guy. That colors his writing ( as I would expect) But note that your sited source was written in 2006 and The End series continues to sell very well. Animal Farm, The Lord of the Flies, Catcher in the Rye there is fiction that does not have a happy ending by any stretch of the imagination. Farenheight 451 has a bit of hope as does War of the Worlds but face it a lot of fiction ( science and other wise) is just plain morose.
Well, let's see what we can do about that. We may need to start a new publishing house that specializes in hopeful fiction, as is condign, seemly, and appropriate for Christians on this side of the Resurrection!