This book was interesting and a little confusing at the same time. I loved the powers of Echo, Cassie, Alice, and Kira - they are total badass women! This book had a bit of angst and I was worried about the ending a little. I got my HEA/HFN, so I was happy. I love stories about fated mates like these. And just saying, this had an epic fight scene at the end...totally worth the read.