DS is 6. He has just become a 'free reader' at school so I told him I would get him some books as a 'well done'.
He adores plants vs zombies and DH is a bit of a zombie obsessive so I ordered him these to read.
He has torn through the first one in 3 days, I read them first and although they are a little more gruesome than I would like, there is nothing that would disturb DS. I read it more as 'disgusting stuff is funny' schoolboy humour. I would rather compromise and know he is really enjoying the book, than give him something more sanitized that he would maybe flick through.
I mentioned it to my sister and she was 
AIBU?