Echo's Wolf Series by Lia Silver

Echo was created to be a weapon.Echo was born when a secret laboratory tried to genetically engineer the perfect assassin. Two clones survived: Echo, the success, and Charlie, the failure. Stronger and faster than any normal human, Echo knows no life but killing, and has never loved or been loved by anyone but her frail sister. But that’s about to change…DJ Torres made himself into a Marine.DJ was born a werewolf. But he grew up to be a rebel, and left his pack to join the Marines... moreEcho was created to be a weapon.Echo was born when a secret laboratory tried to genetically engineer the perfect assassin. Two clones survived: Echo, the success, and Charlie, the failure. Stronger and faster than any normal human, Echo knows no life but killing, and has never loved or been loved by anyone but her frail sister. But that’s about to change…DJ Torres made himself into a Marine.DJ was born a werewolf. But he grew up to be a rebel, and left his pack to join the Marines. When his helicopter was shot down in Afghanistan and his best friend lay dying in his arms, DJ bit him to save his life. Revealed as a shifter, DJ is imprisoned in the lab and subjected to mind games and experiments. But the lab rat is about to bite back…Can two misfit people fit together? Echo was engineered to surpass the limits of the human body, but she doesn’t know how to relate to other human beings. No one thought DJ could make it as a Marine, but he doesn’t know when to quit. When they’re forced to partner up, will they betray each other as their only chance to escape? Or will they risk everything on a love that crosses the battle lines?Prisoner is free at all e-book vendors. It has a happily-for-now ending. Its sequel, Partner, has a happy ending and concludes the "trapped in an evil lab" arc. less

Echo has devoted her life to protecting her sister. In all her years as a genetically engineered assassin, Echo never met anyone like DJ Torres before. The captured werewolf Marine offered her trust, friendship, love, and the hope of freedom— not only for herself, but for the frail clone-sister she won’t leave behind. But will Echo’s dark secret destroy their hopes for the future? DJ Torres would give his life to save his buddy. DJ has spent his life accomplishing the impossible... moreEcho has devoted her life to protecting her sister. In all her years as a genetically engineered assassin, Echo never met anyone like DJ Torres before. The captured werewolf Marine offered her trust, friendship, love, and the hope of freedom— not only for herself, but for the frail clone-sister she won’t leave behind. But will Echo’s dark secret destroy their hopes for the future? DJ Torres would give his life to save his buddy. DJ has spent his life accomplishing the impossible. But now he’s faced with a dilemma that threatens to crush even his bright spirit. DJ can’t rescue his captured buddy without fleeing the lab. Echo can’t flee the lab without abandoning her hostage sister. Will DJ be forced to choose between his best friend and the woman he loves? Will love keep them together or tear them apart? Still held captive by Wildfire, a shady government agency, DJ and Echo are forced to go on a series of missions, from undercover escapades at an excruciatingly elegant diplomatic party to a desperate battle in a terrorist compound. Their relationship grows stronger under fire… until they are confronted with a terrible choice. Partner is a sequel. Please read book one first. Book one, Prisoner, is FREE here: http://www.amazon.com/dp/B00LFS2W7U/ Partner is a complete novel with a happy ending and no cliffhanger. less