** spoiler alert ** 
 Having read <<Fallen>> and <<Torment>>, I didn't expect much from this book, and it lived up to my expectations. 
 It took me way too long to read it. Normally, I read a book in several days, but with this one my talent to procrastinate showed its best. I just couldn't get sucked into the story. At times, the plot kept me mildly interested, but that's about it. Maybe part of it was the fact that I like the 1st person narration better, it feels kind of like <<going 3D>>. 
 The book left me with more questions, than answers. Very often it was like <<Wait, what? How is that even possible??>> . And, worst of all, I just couldn't feel the romance I was constantly being told about. And that made me pay attention to everything else. 
 Here are some general thoughts: 
 * Luce's travel through time seemed too rushed, like hopping from place to place with no purpose and result whatsoever. I guess the point was that she learned something from each life experience, and she said she did, it's just that I did'n. With a couple of exceptions, it was always the same pattern: come, see herself and Daniel, kiss, combust, hop into the Announcer and travel to some other lifetime. 
 * In "Fallen" Daniel mentioned that they had been togather at the opening of the Globe theatre in London and had the best seats in the house. But in "Passion" it is said that at the opening Luce was only three years old and came there with her family, sitting on her older brother's shoulder and Daniel was an actor. 
 * Never once did Luce question who Bill was. What was his agenda? Why did he choose to help her? Sure, after seeing so much of the supernatural, she shouldn't have been so blindly trusting. Everybody else (including her beloved Daniel) told her to keep away from her past selves lest she might occasionally do something wrong and change the past/erase future/ cease to exist. But Bill encouraged her to do that, taught her how to cleave, and again, she never questioned his motives. 
 * All the way through the book we are told that Luce can do something in her past to break the cycle, find some loophole and change her and Daniel's story, but in the end, it was Daniel who did it, having talked to the Throne and begged for mercy. 
 * I get it that Daniel is a fallen angel, but still, how is it possible that he killed a lot of people in the past (like in Chichen Itza and China) and still had a pure, bright soul? I haven't read the Bible, so I don't know the rules, but I guess killing is one of the deadly sins and it had to have some impact on his angelic nature. Or did the fact that it was self-defense/protecting Luce make it right? 
 * The whole soul-killing thing almost made my brain short-circuit. Ok, so Luce was advised to kill her cursed soul, trapping it inside her past incarnation's body. But wait, how many souls does she have? Every once in a while we are reminded by the author that all Luces share a soul. I figure it should be one and the same soul. So if she killed it in the past, how is it possible that she still would be well and alive AND the same person in the future (with the minor detail of not remembering Daniel)? Someone, please, explain it to me if you understand the whole thing better! 
 * As for Daniel changing his appearences over time, I should say that I don't have a problem with that. In Richelle Mead's Succubus series it was explained that both angels and demons could choose to look anything they wanted to humans, to disguise their true form because seeing it would kill a mortal . In <<Passion>> we also see that Daniel's <<unbridled glory>> killed a lot of people and even Luce, though she was able to stand it a little longer. So Daniel just chose the appropriate appearance so he didn't look strange to other people in that particular time and country. But maybe preferred to stick to his current appearance whenever it was possible, because it was his favourite and he was used to it. The same might also apply to Luce, she had the same soul, but she didn't always have to look the same. But that's just my guess, maybe Lauren Kate meant something different, but anyway, she never explained that to us readers. 
 I'm still going to read the next installment, because I still hope to get some answers to my questions.