I wasn't that impressed with this book. The heroine was such a bitch, and the reason she gave for it felt like a flimsy excuse. Ace wasn't much better, blaming his Adrenaline difficulties for using women. I couldn't see why these two were falling in love! I did enjoy reading about the younger brother, so hopefully his book will be much better than this one! Sadly, this one was a miss for me, and that's bad, considering that there are so few actual superhero romances out there.