Spoiler warning: this review contains minor spoilers for the series, but none for this specific book. If you've read this far in the series, you're good to go.Every book in this series gets better, and Nemesis is no exception. I discovered this series right before Inimical (book 3) released. If you've read this far in the series you know that is the WORST one to end on because of what happens to Rouen. It was painful waiting for an entire year for the next main installment after reading 1 – 3 back to back. I'm so excited Nemesis is here and we can finally save Rouen! (I hope!)Nemesis is shorter than the other books in the series but so much happens! There's lots of action and tension since, you know, Dark Rouen wants to eliminate Syl and take over all of Faerie. Do yourself a favor and read it in one sitting. Don't get to about 50 pages from the end and have to go to bed so you can go to work because that is NOT a good stopping point! 😅Throughout Nemesis we get background information on some characters we've met before, meet a handful of new ones, and the dark Fae kids return! The background info reveals affect both Syl and Rouen, which changes how they tackle their current situation. I suspected who a character really was when they were first introduced in an earlier book and I celebrated when I found out I was right…then I read a few more sentences and DID NOT SEE THAT COMING! 😱 Celebration to shock in 3 sentences.Per usual, Syl and Rouen are excellent together. Their entertaining banter lightens the tense action scenes, even with Rouen under a spell. I really loved Rouen's struggle now that her dark side is in control. She remembers her feelings for Syl but her dark side wants more power and doesn't really care about Syl. Enter Jarden (yes, that puca!!) who decides to gift Rouen with a way to control Syl and become Overqueen of all Faerie. Rouen's dark side can't turn down the offer of more power, even though Rouen knows Jarden can't be trusted. It's never good when Jarden enters the picture and you know it's terrible for Syl that she's helping Rouen.Syl learns the fair Fae will wake soon and thinks it's great because they can stop the dark Fae. Then she learns both Faerie realms will perish in 7 days when they wake. It's not a lot of time, especially when Dark Rouen knows she has to kill Syl to prevent Faerie Armageddon and has no problem doing it.During all this chaos, Syl and Rouen also grow in their relationship. Syl refuses to give up on Rouen even though Dark Rouen has control and decides Syl is a rival to eliminate. Rouen struggles between her feelings for Syl and trying to be the queen her people need. Syl learns some things about Rouen that impact their relationship, but they work through all this while also trying to figure out how to save their people. The ending is perfect. There are a couple loose ends (mostly I'm not giving up on a certain character who got swept up in one of the battles!) I'm assuming these will be handled in the final book which releases in 2020. I hope it ends with them on a Disneyland trip because they deserve a vacation after all this. 😉