When the sins of the past come knocking on her door, Ellie Matthews must confront her darkest fears. 

The relative tranquility of Ellie Matthews’s life is shattered when her estranged stepfather Marcus resurfaces, pleading for help against an unknown danger. Ellie’s peaceful sanctuary is quickly tainted by an ongoing murder investigation. The victim: Marcus's ex-wife, Katie.

When investigators set out to question Marcus, he is nowhere to be found. In a jarring twist, Marcus dies in an apparent drug overdose. When Ellie and Detective Baxter search Marcus’s residence after his demise, they find unsettling evidence linking him to a series of murders, including the death of Ellie's own mother. Despite the mounting evidence against Marcus, the case isn’t sitting right with Ellie. Was Marcus a cold-blooded killer, or was he being set up for the perfect crime?

When the FBI is pulled in to help with the case, Ellie is brought onto the task force to uncover Marcus’s dubious past. It is only after she receives a threat of violence that Ellie realizes that her own family may be the next target. But with every secret exposed, Ellie finds herself further ensnared in a mystery that not only threatens her life, but has her doubting everything she’s ever believed about her past.

From USA Today bestselling author Caroline Fardig comes a How to Get Away With Murder-meets-CSI series nominated for multiple best fiction awards. Sins of the Father is the sixth in a gripping forensic mystery series that will enthrall fans of Melinda Leigh, Kendra Elliot, and Lisa Regan.