Reviewed by: Rabid Reads. 
 Kristen Callihan has been 5-for-5 with her DARKEST LONDON series, and I've been looking forward to Adam's story most of all, so when the mailman delivered SOULBOUND the pressure was on. This installment brought with it plenty of new revelations with regards to the Fae, the King of the GIM's curse, and we finally discover what was plaguing Archer in FIRELIGHT. The writing was as strong as ever, and the author made me weep with her romantic elements, but this book had a degree of predictability to it that the others didn't which is why Callihan's perfect rating streak must end here. 
 This world is peppered with paranormal excellence from the mythology to the plethora of otherworldly characters; however only the Ghosts In The Machine have captured my interest to the point of obsession. Spooks are common enough in this genre, but this author's approach is exceptional, bar none. Adam's nature has been one of this series' most closely guarded secrets, and is so intricately linked to the Fae that an examination of one will spoil the other, and both get cracked wide open in this novel, thus expect a deluge of answers, just not from me. Ha! 
 As astounding as all of this book's epiphanies were, they paled in comparison to the atypical conclusion. Callihan didn't simply choose the path less traveled, she forged her own, and in doing so completely changed the definition of happily-ever-after. A common complaint of mine where ghost romances are concerned is that there aren't any easy solutions to unite the couple, and the obvious fix is the one that no reader wants to face. I loved the direction that Adam & Eliza's story took, although it was partially to blame for this installment's foreseeable chain of events. 
 Two of DARKEST LONDON's previously featured heroines are GIM, so a coup on their King meant that this novel's plot arc was widespread which had its benefits because the better part of this series' characters got a word or two in. The mystery behind book 1 was solved at long last, and will in all probability carry over to the next title if Sin has anything to do with it, although I wouldn't mind terribly if Lucien's tale took precedence, especially after his recent admission. I guess the point I'm trying to make is that wherever this author goes from here, I will follow. 
 SOULBOUND will make you believe in the impossible, there is love after death. ~4.5 stars