What I really liked about this one is getting a glimpse at Adrian's past....that look back into his life, or lack of one. It was hinted at in past books, but you get a little more detail into why he is who he is and did some of the things he has before.
This novella jumps back and forth between current day and several points in Adrian's past. From the death of his parents to his life with Alan, and his visits to the lab. Which makes it more startling that he would go back to seek answers to help Ria. Not that I don't think he would do all he could to help her, but getting involved with Alan again is just bad news.
The one downside is that there were grammatical errors, and it pains me to say it, but they are starting to bother me more now than they did before. However, given this was shorter than the usual books, there are not a lot of them.
I'm definitely looking forward to the next book.