The Princeton Guide to Historical Research is exactly what it says it is. In this book, it details historical methodology and parts of historical research such as defining history, to scoping out research design, to less noticeable stuff like writing style and narrative.
It is a very useful book to have as a reference. What I got most out of this book is how historians think, do their research and overall get a feel for what the field is. It also made me think about history and the nuances that it contains when writing about it. I've read a few history books in my day and haven't really taken things like narrative and the way people organize events. Even ending a book at a particular date entails something. Overall, it is a pretty good read, even if the subject matter is more niche than usual. I will certain read history in a different light now.