More well known for her family life fiction, here are four true crime novels written at the beginning of Karen Kingsbury's. They include a special reader's letter from Karen explaining how the darkness in these stories became more than she could bear and prompted a dramatic career change to write Life-Changing Fiction.

Final Vows: When Carol Montecalvo began writing to a man in prison through a program at her church, she considered it her Christian duty. But these letters soon became her lifeline as she fell in love with Dan, the man behind the letters. In Final Vows, Karen Kingsbury chronicles a couple's unlikely romance and marriage, and what led to Carol's bloody death on her kitchen floor. It seems her husband has obvious motives for murder. But is this former felon really guilty? Or could he actually be a grieving widower, in the wrong place at the wrong time, showing the wrong type of emotions when faced with his wife's lifeless body?

Deadly Pretender: CIA Agent. Business Owner. Lobbyist. Bigamist. David Miller was the envy of both friend and foe, with a dream job and perfect family. He seemed to have it all. But he wanted more. One family wasn't enough: he wanted two. Two careers weren't enough; he invented a third. He juggled it all quite well . . . until the day his two wives found out about each other. David Miller groped for ways to hold on to his finances and reputation. His solution? Murder. But it had to be done right, leaving him off the list of suspects.

The Snake and the Spider: Florida. Spring Break. Words that evoke excited anticipation for young adults . . . and extreme angst for their parents. But the parents of best friends Daryl Barber and James Boucher were confident their sons could be trusted to spend a week in the sun without them. As they all waved goodbye, no one imagined it would be the last time they'd see each other alive. When the boys missed their agreed-upon daily check-ins, both sets of parents were disappointed. When the boys failed to come home on their planned return date, both sets of parents were furious. And when it was clear the boys had vanished without a trace, both sets of parents were terrified.

Missy's Murder: On an October day, teenager Missy Avila was lured into the woods, beaten, tortured, and drowned. Missy's best friend, Karen, publicly vows to find the killer and even moves in with Missy's family to help. No one could have guessed what would happen next. Missy's Murder is a shocking tale of how jealousy can drive people to acts of great evil.