Whether to give away endings is always a big question when you're talking about books, and it's even more important of an issue when talking about mysteries. Overall, our policy is to avoid spoilers, especially in reviews of new books and shows. Sometimes, though, the ending is what we want to write about. (This may especially be the case in our Rereads series, which is about older things anyway.) When there are spoilers, this warning will appear at the top of the post:
WARNING: SPOILERS! WARNING: SPOILERS!
I know it's not ideal, but I hope that will at least help a little. If you have any other ideas of how to deal with this, let me know.