Blaze of Memory (Psy-Changelings, Book 7) by Nalini Singh

So everyone else has explained the plot really well. We have Dev and Katya with Katya brainwashed to kill Dev at some point. We never do find out what her trigger was for her attempt to assisinate him since that scene is from his perspective. While some people have complained about the discrepancy between Dev's strength and Katya's wilingness to follow him, I liked that about the book. There wasn't a lot of angsty drama with her doing her own thing no matter what. I get so tired of that in books where the author seems to just add the drama that the story lacks. I liked both Katya and Dev as characters, they were really sympathetic and(SPOILER) yes I cried at the end when they were happy anf during the scenes where she says goodbye before she thinks she will die. I don't usually go for melodrama, but in this book it worked for me.