Rebel - Zoe Archer

I adored this book. I enjoyed how Nathan and Astrid worked together. Astrid's intelligence and abilities weren't downplayed or disrespected. She was respected and treated as an equal. There's also Astrid's quiet strength that fortifies and builds Nathan's. Awesome!
I enjoyed each book more than the previous, so if this holds up, Stranger (book 4 and the last) will be kick-ass!