Discover why ZeroMQ is rapidly becoming the programming framework of choice for exchanging messages between systems. With this practical, fast-paced guide, you'll learn how to use this lightweight and highly flexible networking tool for message passing in clusters, the cloud, and other multi-system environments. Created by ZeroMQ maintainer Pieter Hintjens and volunteers from the framework's community, this book takes you on a tour of different real-world applications, with extended examples in C. You'll learn how to use specific ZeroMQ programming techniques, build multithreaded applications, and create your own messaging architectures.