Book Shelf Styling Conundrum

I love to style up bookcases.  This image above from The Coveteur, is one of my faves. It's exactly how I like to zhush...objects and books with some open spaces too.  However, there's a wall of built in bookcases in my husband's home office that I just can't get right.  Part of the problem is that the books shelves are quite long. In hindsight, I think we should've broken them up into smaller sections...but since we can't go back and reinvent the wheel, I've decided to comb the web for some more masculine bookcase inspiration (since the other part of the problem is that I'm bringing too much of a feminine vibe to the situation).  Thankfully, Miles Redd has some great examples of how to achieve a decidedly more masculine and sophisticated bookcase. I'm off to try to channel this very same energy...