There are 15 books in the Psy-Changeling series. The newest book is Allegiance of Honor which came out in 2016.

THE FIRST PSY/CHANGELING NOVEL from the New York Times bestselling author of Shards of Hope, Shield of Winter, and Heart of Obsidian...
The book that Christine Feehan called "a must-read for all of my fans."
In a world that denies emotions, where the ruling Psy punish any sign of desire,…
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2
Visions of Heat

Book cover of Visions of Heat
A Psy/Changeling novel from the New York Times bestselling author of Shards of Hope, Shield of Winter, and Heart of Obsidian..."the alpha author of paranormal romance" (Booklist).
Used to cold silence, Faith NightStar is suddenly being tormented by dark visions of blood and murder. A bad sign for anyone, but…

3
Caressed by Ice

Book cover of Caressed by Ice

As an Arrow, an elite soldier in the Psy Council ranks, Judd Lauren was forced to do terrible things in the name of his people. Now a defector, his dark abilities have made him the most deadly of assassins - cold, pitiless, unfeeling. Until he meets Brenna ...

Brenna Shane…

4
Mine to Possess

Book cover of Mine to Possess

Nalini Singh pulls away another dark layer of sheer desire, revealing passions unknown, in her latest novel about the world of the Psy. A ghost returns from a leopard changeling's past, making him question everything - even his base animal instincts ...

Clay Bennett is a powerful DarkRiver sentinel, but…

5
Hostage to Pleasure

Book cover of Hostage to Pleasure

Separated from her son and forced to create a neural implant that will mean the effective enslavement of her psychically gifted race, Ashaya Aleine is the perfect Psy: cool, calm, emotionless ... at least on the surface. Inside, she's fighting a desperate battle to save her son and escape the…

6
Branded by Fire

Book cover of Branded by Fire

Though DarkRiver sentinel Mercy is feeling the pressure to mate, she savagely resists when Riley Kincaid, a lieutenant from the SnowDancer pack, tries to possess her. The problem is not simply that he pushes her buttons; the problem is that he's a wolf, she's a cat, and they're both used…

7
Blaze of Memory

Book cover of Blaze of Memory

Nalini Singh returns to the Psy/Changeling world as a woman without a past becomes the pawn of a man who controls her future ...

Dev Santos discovers her unconscious and battered, with no memory of who she is. All she knows is that she's dangerous. Charged with protecting his people's…

8
Bonds of Justice

Book cover of Bonds of Justice
A Psy-Changeling novel from the New York Times bestselling author of Shards of Hope, Shield of Winter, and Heart of Obsidian..."the alpha author of paranormal romance" (Booklist).Max Shannon is a good cop, one of the best in New York Enforcement. Born with a natural shield that protects him against Psy…

9
Play of Passion

Book cover of Play of Passion

Passion and reason collide with explosive force in the newest installment of Nalini Singh's 'mesmerizing' Psy-Changeling series. As a conflict with Pure Psy looms on the horizon, two powerful wolves fight a far more intimate war of their own ...

In his position as tracker for the SnowDancer pack, it's…

10
Kiss of Snow

Book cover of Kiss of Snow
A Psy/Changeling novel from the New York Times bestselling author of Shards of Hope, Shield of Winter, and Heart of Obsidian
Since her defection from the PsyNet and into the SnowDancer wolf pack, Sienna Lauren has had one weakness: Hawke. Alpha and dangerous, he lost the woman who would've been…

11
Tangle of Need

Book cover of Tangle of Need
From the New York Times bestselling author of Shards of Hope, Shield of Winter, and Heart of Obsidian
Discover the exhilarating risks of passion in this breathtaking Psy-Changeling novel...

Adria, wolf changeling and resilient soldier, has made a break with her past-to face a devastating new challenge: Riaz, a SnowDancer…

12
Heart of Obsidian

Book cover of Heart of Obsidian

Step into NEW YORK TIMES bestseller Nalini Singh's explosive and shockingly passionate Psy-Changeling world ...

A dangerous, volatile rebel, hands stained bloodred.

A woman whose very existence has been erased.

A love story so dark it may shatter the world itself.

A deadly price that must be paid.

The day…

Assassin. Soldier. Arrow. That is who Vasic is, who he will always be. His soul drenched in blood, his conscience heavy with the weight of all he's done, he exists in the shadows, far from the hope his people can almost touch - if only they do not first drown…

14
Shards of Hope

Book cover of Shards of Hope

Awakening wounded in a darkened cell, their psychic abilities blocked, Aden and Zaira know they must escape. But when the lethal soldiers break free from their mysterious prison, they find themselves in a harsh, inhospitable landscape far from civilization. Their only hope for survival is to make it to the…

15
Allegiance of Honor

Book cover of Allegiance of Honor

The Psy-Changeling world has undergone a staggering transformation and now stands at a crossroads. The Trinity Accord promises a new era of cooperation between disparate races and groups. It is a beacon of hope held together by many hands: old enemies. New allies. Wary loners.

But a century of distrust…