James Rollins Sigma Force Novels In Order

Power. Obsession. Pleasure. Pain. Behind every Alpha lies a dangerous hunger—and these men don’t ask for permission. They take what they want. Sinful Alphas is a scorching collection of interconnected dark romance stories featuring dangerously possessive Alphas, forbidden desires, obsessive love, and heroines who find themselves caught between temptation and destruction. From ruthless pack kings and morally gray billionaires to primal mates, secret arrangements, revenge seductions, and enemies who crave each other far too much, every story explores the intoxicating line between dominance and surrender. These aren’t sweet love stories. These are tales of obsession so consuming it burns. Passion so addictive it destroys. Desire so sinful it feels dangerous to crave. Inside this collection, you’ll find: * Possessive Alpha males * Enemies-to-lovers tension * Forced proximity * Forbidden attraction * Mates, secrets, betrayal, and obsession * Explicit spice, emotional chaos, and addictive twists Some loves save you. Others ruin you beautifully. Enter at your own risk.

What if humanity’s cruelest monster is the only one who can save you? In the toxic slums of Sector 4—far beneath the glittering glass domes of the elite city—there is only one rule: keep a low profile and stay alive. Jada is a master of survival. From the scraps discarded by the upper class, she builds everything she needs to exist in this merciless world. But during a brutal raid by the ruling Consortium, her identity scanner suddenly flashes a blood-red alarm. The verdict is neither prison nor death. It is: Sector Omega. Sector Omega is a myth born of whispered nightmares. It is the Consortium’s deepest underground laboratory, where the authorities breed genetically mutated supersoldiers. Jada is thrown into a pitch-black cell as a "calming companion" for the most dangerous experiment of all: Subject Zero. He calls himself Kael, and he is the Apex. An unstoppable beast, engineered for war in the toxic outer world—a nightmare of muscle, claws, and blinding rage. Every woman sent into this cell before Jada never left it alive. Yet, when the monster attacks from the shadows and lunges at her, he suddenly halts. The beast catches a scent. In the rebellious scavenger, Kael sees no prey—he recognizes his destined mate. With a single, guttural "Mine," Jada’s fate changes forever. Certain death transforms into a perilous alliance. Kael vows to protect his mate with his life, while Jada discovers the man hidden beneath the monster. To escape the cruel Consortium, they must ignite a bloody rebellion together—one that will shake the dystopian world beneath the dome to its very foundations. For an Apex does not share. Tropes: Sci-Fi Dystopia, Werewolf Romance, Fated Mates, Touch Her and You Die.

Follow Jake Swift and his team of elite ex-military personnel in this series of short stories. Book 1 Saving Erin. Deep in the treacherous ice-cold mountains, Erin is running from a monster when she stumbles upon Jake Swift and his highly trained security team. Will Jake, the handsome, rugged ex-military man, be the one to save her? Book 2 Tank. When a beautiful woman crashes into his life, will Tank be able to save her from the devil himself? Book 3 Laila. Laila has always been the strong, feisty one of the group, but when she finds herself captured, who will be the one to save her? Book 4 Madog. When Ruby turns up for work, what starts as a normal day ends in disaster. Will Madog and the Swift security team get to her in time? Book 5 Ben. He found her; she was broken. It takes a strong man to handle a broken woman, but it takes a stronger woman to come back from being broken.

Jagger has a double life, a life bound to the law and another where he breaks every law known to man as he does his job as The Enforcer for the New York City Mafia. Jagger has been engulfed in sorrow since he lost the woman he loved and their baby when she got caught up in the dark side of his life.  Jagger sank into depression, drugs, and alcohol while trying to fight off his demons and get revenge for what happened to the woman he loved and their baby. The man that killed them is a ghost, a ghost Jagger can’t seem to find. Jagger rebuilt his life, becoming the most reputable criminal lawyer in New York City, and now he needs to face the man he stole his woman from in court. His past seems to come back to haunt him when he meets the only woman who has made him forget about his past and wants to be with someone again.  Calliope Flores is a law student who is suing one of her professors for sexual harassment. Her life has turned upside down, as she has to deal with what happened and relive it every second of every day. When she meets the lawyer representing her professor, her disgust for him mixes with lust, desire, and a mind-blowing sexual attraction.  Callie tries to fight off her desire while cultivating the anger that fuels her body. Getting mixed up with a big-time lawyer from the opposite side seems like a mistake Callie is willing to make if it will make her feel alive again.  This is the third and last book of The Legacies series. This book can be read as a stand-alone, but it is recommended to read the other books first for better comprehension. 

Keeping her safe has become his life's mission. 
 Gage Hendrix is a man without roots. As an MSD Team Leader for the Department of State, he operates in high-threat environments. Serving in dangerous postings around the world, his team provides emergency security support and crisis response. Keeping the US ambassador's daughter safe in Sri Lanka? An unusual assignment for an "action group" used to dealing with evacuations, wars, incursions, and coups. Expecting a spoilt princess, Gage finds a hard-working therapist with a huge heart and sad eyes. 
 Hiding from heartache is no longer an option. 
 Chantal Durant's best friend has gone into hiding with intel that could lead to a nation's upheaval. Enemies have targeted the last person who helped her to escape… Turning a tragic past into a constructive existence, Chantal dedicates herself to helping others. She likes her work, likes her routine, and doesn't like that her safety is now in the hands of a cocky MSD agent. Her undeniable sexual attraction for the ruggedly handsome bodyguard would not only end his career but could get them both killed. 
 As multiple threats close in, Gage is faced with harrowing decisions. Trapped in an unfamiliar landscape, both Gage and Chantal will have to act fast to make it out alive. "If you're looking for the perfect blend of action and steam set against the backdrop of exciting international locales...your first stop should be Louise Dawn." - Janie Crouch.

At the age of ten, Charles loses everything—his memories, his family, and his identity. Found wandering alone after a mysterious incident, he is adopted by the compassionate Chris Lynch family, who raise him as their own. Gifted with extraordinary intelligence and determination, Charles rises from humble beginnings to become one of the youngest and most successful entrepreneurs in City A. Just as he prepares to enjoy the rewards of years of hard work, his world comes crashing down. Five years later, the global business landscape is dominated by a mysterious figure known only as The Alpha, an enigmatic billionaire whose influence extends across finance, technology, shipping, energy, and international politics. His true identity is unknown even to world leaders, yet his decisions shape markets and governments. Behind this carefully guarded persona is Charles, who transformed his greatest defeat into unimaginable power during the years everyone believed he had been broken. Amid the pursuit of justice, Charles finds himself torn between two women. Evelyn, the woman who first captured his heart and never truly stopped believing in his innocence, represents the life he lost. Amelia, the courageous woman who secretly gave birth to his son while he was imprisoned, represents the family and future he never knew he had. With powerful enemies closing in, hidden identities exposed, and a decades-old conspiracy threatening everyone he loves, Charles faces the greatest challenge of his life. To clear his name, protect his family, and uncover the truth about who he really is, he must risk losing everything once again. The Phantom Alpha is an epic tale of betrayal, resilience, redemption, love, and revenge, proving that while a person's identity can be stolen, their destiny can never truly be erased.