Where Cybersecurity Meets Fiction — techno-thrillers that teach real network security concepts to young adults
The Z.R.A.K. series is a five-book young adult techno-thriller collection by Miro Feld, a Czech author and IT professional with over 30 years in the industry. Set in Prague, the stories follow two teenagers — Tomas and Nela — as they uncover wireless security threats using observation, documentation, and technical skill.
Each book is grounded in real cybersecurity concepts. The threats are authentic. The tools are real. The techniques described actually work. But the series teaches a clear ethical framework: observation instead of action, documentation instead of confrontation.
Available in English and Czech editions as eBooks.
Two Prague teenagers independently detect the same crime — fake hotspots, skimmers, suspicious surveillance — and connect their findings through a shared device address, uncovering something larger than either expected.
Seeing invisible infrastructure. Public WiFi vulnerabilities. Bluetooth and WiFi signal leakage. Physical proximity requirements for digital attacks.
Someone is poisoning the WiFi at Prague's cafes. The passwords are real. The encryption is active. But the threat is inside the trust — operating within networks that look completely normal.
Distinguishing normal from abnormal. DNS and certificate-based trust. The challenge of detecting attacks within authenticated networks.
A classmate's mother receives unauthorized invoices despite strong security measures. Investigation reveals a familiar device appearing where it shouldn't — with implications nobody anticipated.
Threat migration patterns. Physical access as an attack vector. Upstream compromise of secured accounts. False assumptions about who poses a threat.
Unmarked wireless devices appear throughout Prague utility closets — no claimed ownership, no installation records. The focus shifts from ongoing crime to systemic vulnerability in institutional infrastructure.
Institutional responsibility. Hardware supply chain misuse. Evidence preservation. Systemic versus individual accountability.
A police investigation of a fractal antenna photograph connects separate cases across different cities. Larger patterns emerge — without clean resolution, reflecting the reality of real-world cybersecurity investigations.
Pattern persistence across time. Institutional versus individual agency. Permanent awareness despite incomplete outcomes. The reality that not all investigations end with clear answers.
A disgraced signals intelligence specialist detects an anomalous Bluetooth signal beneath an abandoned garage — where no transmission should exist. The signal strength is declining, and that means the danger is growing.
Coming soon. English edition.
Two volumes, 271 stories total. Wireless Recon (135 stories) covers WiFi detection, network reconnaissance, counter-surveillance, and RF analysis. Active Defense (136 stories) covers incident response, physical counter-surveillance, skimmer hunts, rogue cell tower takedowns, and courtroom forensics.
Global settings from Bieszczady mountains to Mumbai. Fiction that teaches. Suspense that educates.
Each book maps to hands-on lab exercises
| Book | Key Concept | Related Lab |
|---|---|---|
| Signal | Rogue hotspot detection, signal analysis | Evil Twin Detection Lab |
| Baseline | Network baseline, DNS poisoning | Network Baseline & Drift Lab |
| Pattern | Device tracking, rogue device identification | Bluetooth Reconnaissance Lab |
| Source | Infrastructure audit, unknown device discovery | Device Discovery & Inventory Lab |
| Trace | Incident correlation, cross-case patterns | Incident Response & Reporting Lab |
Miro Feld is a Czech author and IT professional based in Polička, Czech Republic, with over 30 years of experience spanning architecture, programming, and cybersecurity. His writing sits at the intersection of cybersecurity, youth culture, and the invisible digital infrastructure that holds modern life together.
His stories examine real threats and real tradecraft — grounded in authentic technical knowledge from three decades of industry work.
More about the author →