The Obsidian Chamber

I sort of liked it. PrestonChilds are good writers and tell an interesting story which is why it got 3 stars rather than 2.
The problem is I'm not interested in nor do I like Diogenes.
In general, I'm not interested in the bizarre relationship between A. Pendergast and D. Pendergast.
I think Constance is intriguing but not Diogenes' obsession with her.
I found the ending unsatisfactory.
All I can say is I read it and I don't think you'll miss much if you skip it.