There’s not that many books devoted to financial asset investigation. How To Do Financial Asset Investigations is my favorite and the best one that I’ve found so far.
This book was recommended to me by a client. It’s not a large book, but it’s chalk full of valuable lessons in judgment enforcement. My clients are blown away by some of my suggestions that I learned from reading this.
This is a fairly recent book (May 2023) by Rae Baker. Rae is a great writer and presents modern tactics that will help you in your OSINT journey.