- RabbitMQ in Depth
- RADIUS
- Ransomware Protection Playbook
- Raspberry Pi programmieren mit C/C++ und Bash
- Reactive Applications with Akka.NET
- Real-World Cryptography
- Red Hat Linux Administration: A Beginner's Guide
- Redes Cisco. Guía de estudio para la certificación CCNP Routing y Switching
- Redes de Ordenadores: Capa de Red
- Redes de Ordenadores: Encaminamiento
- REST API Design Control and Management
- Rete Reti Internet
- Reverse Deception: Organized Cyber Threat Counter-Exploitation
- Ripple And Stablecoins: Building Banks of Tomorrow
- Risk Thinking for Cloud-Based Application Services
- Routers: Questions and Answers
- Routers: Questions and Answers (2020 Edition)
- Routing TCP/IP, Volume II (CCIE Professional Development)
- RYU SDN Framework