Probably the best book of them all so far, Only the Good Spy Young kept me flipping the pages eager to find out what happens next. I knew, from the third book, that this story arc would be a really good one. I wasn't disappointed at all. We still don't find all the answers in this book, but I'm looking forward to the next two to finding out the whole story.
What made this my favorite so far is that everything we thought we knew is now called into question. Those who were trusted before probably shouldn't have been. I love the mystery. We finally get the name of the group after Cammie, but we still don't know a whole lot about them. We are left to stumble along right with Cammie through every step of the way.
This had one hell of a cliff hanger. I went in research of the next book. I'm one of the lucky ones that waited on this series. Other fans of this series have been waiting two years for answers after this cliffhanger. Two years!!! I only have to wait a few more months and even that feels like torture. I'm really hoping I'm not left waiting two years on the 6th and maybe the last book of the series.