This review originally posted at More Than Just Magic 
 I'm really sad that this series is drawing to a close. I think I could follow the adventures of Waverly and Seth, and even Kieran, forever. This is one of the most underrated YA sci-fi series out there. Just like Glow and Spark, Flame is a dangerous, action packed novel that grabs you from the first few pages and doesn't let go. Now that our crew is on the New Horizon they're surrounded by people with questionable motives. It's hard to tell who's telling the truth and what their real plan might be. You're rooting for Waverly and Seth but you're also terrified for them. There's a number of new players on the board, as well as the return of some old familiars. But I never felt overwhelmed by the number of characters and their relationship to one another. 
 There isn't too much I can say about this book without giving things away. The same elements that made me love the first two books are still here. It's intense and suspenseful and keeps you on the edge of your seat. It has romance but it knows when that romance needs to be put on the back burner. And it provides an interesting, and I think balanced look, at religion - the damage it can do (in the form of Anne Mather) and the good it can do (in the form of Kieran). 
 I'm not overly thrilled with how neatly the ending tied up - it felt too easy, too simple. But all things considered this was a solid conclusion to an exciting series. Recommended to the science fiction lover.