Board Thread:Warhammer 40k General Discussion/@comment-3416287-20131029155752/@comment-6078851-20131030152141

GW openly admit that most of their material has been directly based on loads of other people's literature, namely ancient literature of which pretty much everyone (including mr riordan) is guilty.

to paraphrase - "great stories are everywhere and they can be slotted into 40k where they can fit perfectly."

and original stories are pretty much an impossible thing to do. there is such a vast amount of ideas that have been created over the millenia that there isn't anyone alive who can say that their own stories aren't influenced by someone elses. i'm not maligning anyones works, just pointing out that pretty much every story has been told.