This is on of my favorite series. Knox and Harper are great together. I love how they challenge each other and support each other. In this book they are trying out o figure out who the 4th Horseman is and how they can get rid of him. They also are adapting to having baby Asher and figuring out his abilities. I’m not usually a fan of babies in books, but Asher is great :) sadly this is the last book in Harper and Knox’s story, but hopefully they will pop up in their friends stories - and Luke too :)