I think this is a very interesting cover. It just screams mystical to me. I did enjoy this book but I found it odd that Penn would be banished for making a mistake. Later on there seems to be a reason behind it that doesn't get revealed that you kinda figure out while you're reading.
Penn is one of the Fates. Yes he's a guy and that's unusual. He screws up and he gets banished to Earth by the big guy. He isn't like the others upstairs. He becomes fascinated with one of his creations. He is lucky to run into a family that helps him out. They really help him become adjust to living like a human being.
Penn is a good guy and it is understandable that he was torn about a decision he was faced with. Ultimately he did the right thing but something went terribly wrong. People start dying of natural causes even though they are young so Penn wants to know what's going on. He runs into his mentor and the one whose place he took. He is taken back upstairs and now a small group of people are trying to figure out what's going on even though Penn doesn't completely trust one of them. I thought this was a great start to a new series and look forward to the next book which I believe comes out next month.