I think the major thing out of this book is Axel’s character growth. You can see him transform & start to open up, face his trauma, etc. 
I feel like the pace of this one was slightly inconsistent in comparison to book 1 but the plot still gave what it was supposed to & the spice was definitely still there. Also, the last 10% of this book legit had me at the edge of my seat & confirms that scarlet is one of my fav. FMC’s.