You will find lots of resources floating around, I personally didn't like HLA (randall hyde's thing) which is unfortunately one of the largest sources of beginner information.. the assemblers sometimes have decent resources like http://www.nasm.us/xdoc/2.12.01/html/nasmdoc0.html
This question gets asked rather often here, so you could try searching this site for something like "learn assembly" you'll get a bunch of results.
I think a couple of the more popular resources people here recommend are Dr. Paul Carter's book (http://pacman128.github.io/pcasm/) and "The Art of Assembly" (you can just Google "Art of Assembly pdf" and get a bunch of results.
>I picked up this book
I've said it before and I'll say it again: "Assembly Language for x86 Processors" is the reason I passed the assembly course we had to take at school.