Zero Day: A Marcus Redd Thriller (Zero Day Series - Book 1)

Marcus Redd doesn't chase threats. He finds what's already there.A former Army intelligence operator turned one-man cybersecurity firm, Marcus has built a reputation doing the jobs that larger firms won't touch. When a referral lands him a routine security audit at a regional water utility outside Reno, he expects three days of clean work and a standard report.He finds the breach on day three. The problem isn't that someone got in — it's that they've been inside for six months. Persistent access to the SCADA control systems, buried in legitimate vendor credentials, routed through a VPN exit node in Frankfurt. Whoever put it there isn't attacking. They're waiting.By the time Marcus understands what he's looking at, the access pattern changes overnight. Someone knows he found it.Now he's not auditing a breach. He's inside an active operation — one that runs through a terminated IT contractor, a shell consulting firm with a federal badge in its past, and a broker who sells infrastructure access to buyers who don't leave names. The FBI wants him to walk away. Diane Cho, the woman who handed him the contract, knows more than she's telling. And somewhere in a co-working space three miles from his daughter's house, a buyer is preparing to prove what they bought is real.Zero Day is the first book in the Marcus Redd Thriller series — gritty, technically grounded, and built on the uncomfortable truth that the vulnerabilities in critical infrastructure aren't hypothetical. They're already there. They've been there for months. And somebody always knew. Read more