I was reading the book Practical Reverse Engineering: x86, x64, ARM, Windows Kernel, Reversing Tools, and Obfuscation by Bruce Dang et. al, as I am interested in learning about Reverse Engineering. However I found that most of what I was reading made very little sense to me and I felt confused. So my question is, what material should I go through first before returning to this book so that I can get the most out of it? Thanks in advance for your assistance.