Reviewed by: Rabid Reads 
 Lately it seems that many of my favourite paranormal romance series have written all of their main characters' tales, and have started adding secondary ones in order to be able to crank out more installments. The main problem with this is that it's hard to introduce new couples this late in the game, and still have readers connect with them, because they weren't part of the author's original world. Kristen Callihan has succeeded where countless others have failed by A) having enough foresight to provide a bit of back story with a novella (ENTWINED), and B) ensuring that her protagonists were able to stand on their own while still fitting into her DARKEST LONDON universe. EVERNIGHT is a multilayered, beautifully written book, and a stunning testament to the power of love. 
 Callihan continues to break the traditional PNR mold by ensuring that each new installment is truly unique instead of a cookie cutter replica of a similar story, but with a different main couple. These novels could easily be read as stand-alones, however I've given this series 5 stars across the board, so it goes without saying that you should definitely start with FIRELIGHT. The plot line of this book is seriously un-unravelable between Thorne's insanity (what's real vs. mad imaginings), the SOS' machinations, and several other mysterious players who aren't even revealed until the very end. Heck, even the romance left me skeptical as to whether a HEA was even possible for Holly and Will. 
 There's no shortage of paranormal elements in this tale with elementals, GIM (Ghosts in the Machine), fallen angels, Sanguis demons, fae, and shifters all playing vital roles. The DARKEST LONDON world is even further expanded upon with the addition of Here (Earth), There (Supernatural plane), and Nowhere (Hell), along with the seamless blending of the PNR, historical, and Steampunk genres for which this author is famous for. I especially enjoyed this installment because Evernight is an inventor, so on top of outstanding world-building and character development; readers also get tons and tons of gadgets like clockwork hearts and spectrometers! Callihan's imagination is limitless, and she definitely doesn't believe in doing anything halfway. 
 I loved Will and Holly's romance; they are brought together by necessity, torn apart by others' schemes, only to be finally reunited by fate. The cost of love has never been higher with immortality, sanity, and their very lives on the line. Evernight's clever mind, ironclad will, and raw power complimented Thorne's brute strength, sexual magnetism, and cunningness perfectly. The dirty talk between them was deliciously scandalous, and the sex scenes ranged from crude, to tender, to light BDSM. More often than not, I found myself doubting whether either of these characters would ever be able to find happiness, but that too was part of Kristen Callihan's exquisitely executed master plan. 
 Steampunk, historical, paranormal romance--categorize this book however you like, but one thing remains clear, EVERNIGHT was awesome!