Rob Costa

Rob Costa

Rob Costa was born in USA.

Rob Costa is a proud New Yorker who once left for a day but quickly came back. He works in healthcare, writes when he has free time, and loves cooking for his wife, Kaily.

Hide and Seek is the first book in A Detective Al Harris Cold Case Mystery.

What would you do if the stalker who haunted you years ago suddenly came back? Fifteen years ago, Mary Anne Cromway’s life was turned upside down. She was being followed, harassed, and threatened by someone she couldn’t identify, a violent stalker who always seemed one step ahead of the police. Then, one day, her boyfriend Bobby vanished without a trace.

People in their small town didn’t know what to believe. Some said Bobby was just a troublemaker who ran off to avoid consequences. Others whispered that maybe Mary Anne had something to do with it, especially since the terrifying notes stopped the moment Bobby disappeared.

Now, after all these years, Mary Anne receives a chilling new message. The same handwriting, the same disturbing tone. Her past nightmare isn’t over. It's just beginning again.

But this time, she’s not facing it alone. She turns to retired detective Al Harris, a man with a reputation for digging up the truth no matter how cold the case or how long it’s been buried. As Al reopens the old investigation, dark secrets begin to surface - secrets that the town would rather stay hidden.

As the mystery unfolds, Al and Mary Anne must race against time to uncover the stalker’s identity before history repeats itself. Because one thing is clear: whoever’s behind the notes isn’t done yet.

Hide and Seek is a suspenseful, slow-burn thriller about trauma, small-town secrets, and the long shadow of fear. Perfect for fans of cold case mysteries with heart-pounding twists and emotionally layered characters.

In Concrete Graveyard, Detective Al Harris has been digging into cold cases - and that’s making certain people nervous. People with power. People with secrets they want to keep hidden.

When two shady men show up asking questions, Harris gets a bad feeling. And he’s right to worry. He returns to his office to find it wrecked, his assistant Judy hurt, and every one of his case files gone. Someone is trying to stop him. But why? What’s in those files that’s worth attacking over?

To find the truth, Harris leaves behind the quiet small towns and heads to the streets of Chicago. It’s a city with a long memory and deep shadows. The days of Al Capone might be history, but the mafia still holds sway - and they don't take kindly to old secrets being stirred up.

As Harris follows the trail, he uncovers dark truths stretching back generations. What he’s about to learn will tie powerful mob families, buried crimes, and forgotten victims together in ways he never expected.

Concrete Graveyard is a gritty, fast-paced mystery that dives into organized crime, long-hidden cover-ups, and one detective who won’t stop until justice is done - even if it puts him in the crosshairs of some very dangerous people.

Related Authors

Fans of Rob Costa also enjoy these authors:

1. Harlan Coben, author of the Myron Bolitar Series.
2. Lisa Gardner, author of the Detective D.D. Warren Series.
3. Jeff Wheeler, author of the Kingfountain Series.
4. Lisa Scottoline, author of the Rosato & Associates Series.
5. J.D. Robb, author of the In Death Series.

Rob Costa: F.A.Q