I was very entertained by this story. I liked book 4 the best of the first four books in the series. This book centered around Nate, his friends, and their new assignment. The action was almost non-stop. The battle scenes were exciting. I enjoyed the twists, and my attention was riveted by all the machinations of the characters. I thought Andrew B. Wehrlen’s narration was great for this story. He provided different voices for the various characters, and his voice was expressive. I was given a copy of the audiobook. I volunteered, without financial gain, to post this review which reflected my honest opinions regarding this audiobook.