Review: Visions of Heat by Nalini Singh

The particulars: Paranormal Romance, Berkley, available as print and e-book
The Source: Purchased at Kobo
The Grade: B
The Blurb:
Used to cold silence, Faith NightStar is suddenly being tormented by dark visions of blood and murder. A bad sign for anyone, but worse for Faith, an F-Psy with the highly sought after ability to predict the future. Then the visions show her something even more dangerous – aching need… exquisite pleasure. But so powerful is her sight, so fragile the state of her mind, that the very emotions she yearns to embrace could be the end of her.

Changeling Vaughn D’Angelo can take either man or jaguar form, but it is his animal side that is overwhelmingly drawn to Faith. The jaguar’s instinct is to claim this woman it finds so utterly fascinating, and the man has no argument. But while Vaughn craves sensation and hungers to pleasure Faith in every way, desire is a danger that could snap the last threads of her sanity. And there are Psy who need Faith’s sight for their own purposes. They must keep her silenced – and keep her from Vaughn…

The Review:
What I like most about Nalini Singh’s Psy-Changeling series isn’t the romance. No, it is the world. ( Ok, I might be exagerating a bit). The world she has created is detailed, and varied. There is the cold emotionless Psy that governs the world. The territorial changelings, that craves touch. And humans of course. Together they create a world that is stratified with Psy on top and the changelings and humans beneath., At least if you ask the Psy. Tossed into the world is memorable characters. 
This book is no different.  The picture that she painted of Faith’s life before she met Vaughn gave me goosebumps.   My heart went out to Faith when she fretted about wheter or not she would go insane.
As a changeling, Vaughn is Faith’s total opposite. He craves touch, he is violent.
That said, I loved the way he patiently coaxed Faith out of her shell, and helped her grow into the woman she should have been.
So to the weak spots.
It might be because of me, but the sexual tension I felt… flickered. Most of the time it was hidden in the tension to reach the end. I also didn’t like how she treated the mating bond. It felt as if she realised that they needed to be mates, and added the discovery.
Also, the book felt… unbalanced.  I felt that the only one that changed in the book was Faith. Vaughn was the same person at the end of the book as he was at the beginning.