The Athena Effect Series by Derrolyn Anderson

Caledonia has been kept a secret her entire life, raised in isolation by two very troubled people. Despite her parents' disturbing fits, Cal is perfectly content to live as one with the nature that surrounds her, finding adventure inside the pages of her beloved books. When an awful tragedy tears her away from her remote cabin in the woods, nothing she’s ever read has prepared her for a world that she knows very little about. Girls and motorcycles are what bad-boy Cal’s life is all about... moreCaledonia has been kept a secret her entire life, raised in isolation by two very troubled people. Despite her parents' disturbing fits, Cal is perfectly content to live as one with the nature that surrounds her, finding adventure inside the pages of her beloved books. When an awful tragedy tears her away from her remote cabin in the woods, nothing she’s ever read has prepared her for a world that she knows very little about. Girls and motorcycles are what bad-boy Cal’s life is all about. Brought up in a raucous party house by his biker brother, he’s free to do as he pleases, going through the motions on his final days of high school. Aimless, Cal stopped thinking about his future a long time ago. Attacked by a gang of thugs while running an errand for his brother, Cal is in serious trouble until a fierce girl appears out of nowhere to intervene. She chases off three grown men, sparing Cal a brutal beating before disappearing into the night like a spirit. He can’t stop thinking about his mysterious rescuer, and when she turns out to be the weird new girl at school who goes out of her way to avoid him, he can’t contain his curiosity. He’s never met anyone like her before, and the more he learns about the unusual girl with an unusual talent, the more he wants to know. Cal can’t help falling for Cal, but can he keep her from falling victim to a dangerous enemy from her parents' tragic past? less

As their story continues, Calvin and Caledonia find themselves madly in love, on the run, and nearly out of money. When Cal stumbles upon a way to cash in on Cali’s powers, their life on the road becomes a life of leisure. Despite the easy money and newfound luxury, Caledonia’s conscience begins to trouble her. A disturbing warning only serves to confirm her misgivings, making her question her purpose in life... moreAs their story continues, Calvin and Caledonia find themselves madly in love, on the run, and nearly out of money. When Cal stumbles upon a way to cash in on Cali’s powers, their life on the road becomes a life of leisure. Despite the easy money and newfound luxury, Caledonia’s conscience begins to trouble her. A disturbing warning only serves to confirm her misgivings, making her question her purpose in life. Finally, a shocking discovery about the true nature of her powers points the way forward, sending the two Cals on a dangerous rescue mission. Caledonia tries her best to right the wrongs of the past, but will she only end up provoking new and even more dangerous enemies? less

After a winter spent in a tropical paradise, Cali and Layla are ready to put all of the drama behind them and find some meaning in life. Along with Calvin and Michael, they return to their remote property, only to discover more troubles hidden away in the bucolic wilderness. The two Cals settle in happily, but Layla and Michael struggle with their sense of identity, each one seeking out a different coping mechanism... moreAfter a winter spent in a tropical paradise, Cali and Layla are ready to put all of the drama behind them and find some meaning in life. Along with Calvin and Michael, they return to their remote property, only to discover more troubles hidden away in the bucolic wilderness. The two Cals settle in happily, but Layla and Michael struggle with their sense of identity, each one seeking out a different coping mechanism. Just when things are starting to look up, Layla’s need to recreate the past leads her back to a dangerous place, opening the door for for evil to return. Will Layla’s foolish mistake jeopardize everyone’s newfound happiness? less

Things finally seem peaceful for Cali and Calvin, but the twins are still struggling with their new-found freedom. Layla senses that more trouble still lurks in her future, while Michael's happiness is being crushed under the weight of a terrible secret. When someone new discovers the girl's special talents, he will stop at nothing to put them to use. The cousins must face their most brutal adversary yet, and everyone is forced to fight for both their lives and their loves.