If you are interested in the diverse ways pistes and fides are used in early Roman and Christian sources, particularly, then take a look at my most recent book review which has been published through the journal Religion.
It’s a great resource, if a bit pricey.
Also, I had a bit of hell trying to get this thing written. Last December I took a trip back home to the US and had this book packed away in my check-in luggage. The bag was immediately lost and I was in a bit of a panic for the 5 weeks I was away. Especially because I did not want to shell out 150 bucks for a new copy. Thankfully, Heathrow airport was able to find it after I got back in. The tag had fallen off almost immediately, and so it was sitting around, safe and sound.