The genre-defining and beloved first book in Nalini Singh's New York Times bestselling Psy-Changeling series. "My favorite series of all time! Slave to Sensation is where the magic started, and I will never shut up about it."--Ali Hazelwood, #1 New York Times bestselling author "Utterly addictive and thrilling.this is hands down one of my favorite series ever!"--Ana Huang, #1 New York Times bestselling author Aware that the ruling Psy punish any sign of emotion, Sascha Duncan must conceal the feelings that brand her as flawed. To reveal them would be to sentence herself to the horror of "rehabilitation"--the complete psychic erasure of everything she is. Both human and animal, Lucas Hunter is alpha of the DarkRiver leopard changeling pack. After centuries of uneasy coexistence, the two races are on the verge of war after the brutal murders of several changeling women. Lucas is determined to find the Psy killer, and Sascha is his ticket into their guarded society.

But it seems this ice-cold Psy is capable of passion--and the animal in Lucas is intrigued. Now, caught between conflicting worlds, Lucas and Sascha must remain bound to their identities, or sacrifice everything for a taste of the forbidden.