Where to Start with Ava McCarthy
If you are new to Irish author Ava McCarthy, the best starting point is unquestionably her debut novel, The Insider (2009). This book introduces her iconic protagonist, Henrietta 'Harry' Martinez, a brilliant hacker navigating the dangerous intersection of high finance, technology, and organized crime. Starting here allows you to experience the character's development and the escalating complexity of her missions in the order they were intended.
For readers who prefer a self-contained story with a slower-burn, high-emotion focus, the standalone psychological thriller Dead Secret (2016) is an excellent alternative. It offers a clean break from the fast-paced, tech-focused world of the Harry Martinez series, focusing instead on a mother's grief and a dark, twisting family mystery.
Henrietta 'Harry' Martinez Series in Reading Order
Ava McCarthy's signature contribution to the crime fiction genre is her trilogy featuring Henrietta 'Harry' Martinez. Harry is a highly intelligent, tech-savvy security expert and hacker whose professional background closely mirrors McCarthy's own history in software analysis. The series should be read in chronological and publication order, as the events of each book build upon the relationships and personal challenges established in the previous installments.
1. The Insider (2009)
In her debut novel, we meet Harry Martinez as she plunges into the dark underbelly of insider trading and financial manipulation. After her father is implicated in a massive financial scandal, Harry uses her exceptional computer hacking skills to uncover the truth and clear his name. She finds herself matching wits with ruthless corporate criminals who will stop at nothing to protect their secrets. The book was highly praised for its authentic technical detail and was selected as a Sainsbury’s Book of the Month, establishing McCarthy as a strong new voice in modern suspense.
2. The Courier (2010)
The second book in the series expands the scope of Harry's adventures, shifting the setting from Dublin's financial circles to the international diamond trade. In The Courier, Harry Martinez travel to South Africa, where she is hired to investigate a sophisticated diamond-smuggling ring. What starts as a corporate security audit quickly devolves into a deadly game of survival as Harry faces off against dangerous syndicates in a foreign territory where she cannot trust anyone.
3. Hide Me (2011)
In the final installment of the core trilogy, Harry is hired by a casino magnate in the coastal city of San Sebastian to identify a group of highly professional con artists targeting his establishment. When the gang's lead hacker is murdered, Harry goes undercover to take his place inside the criminal group. The undercover operation spirals out of control, pulling Harry into a terrifying web involving drug cartels, international crime organizations, and security threats that test her physical and intellectual limits.
Standalone Novels
Dead Secret (2016)
After completing the Harry Martinez trilogy, McCarthy shifted gears to write Dead Secret, a standalone psychological thriller. The story centers on Jodie Garrett, a mother devastated by the sudden death of her three-year-old daughter, Abby. Convinced that her controlling and manipulative husband, Ethan, is responsible for the tragedy, Jodie takes matters into her own hands, ending his life and accepting a prison sentence. However, her reality is shattered when a journalist named Novak visits her in prison with evidence that Ethan might still be alive. Jodie escapes from custody, embarking on a desperate hunt to uncover the truth behind her family's dark past.
What to Know Before You Start
Ava McCarthy's novels stand out for their technical accuracy and authentic descriptions of high-level computer operations and corporate systems. This authenticity stems from McCarthy's real-life career: she studied physics and nuclear medicine at University College Dublin before working for over twenty years in the software industry, including a role as a computer analyst for the London Stock Exchange. Her ability to translate these complex subjects into readable, fast-paced plots has drawn comparisons to master thriller writers like Lee Child, John Grisham, and Harlan Coben.
Readers should also note that the Harry Martinez series is complete as a trilogy. While the debut novel was optioned for film, there are currently no active plans for a fourth book in the series. Both the trilogy and the standalone novel showcase McCarthy's focus on creating resilient, highly capable female leads who rely on intelligence and technical expertise rather than physical force alone.