The authors of Expert Twisted include leaders in the Python community and core developers of many of the projects covered.  Mark Williams works on Twisted and helps develop the Python Cryptographic Authority's pure-Python TLS implementation. At eBay and PayPal, he worked on high-performance Python web services (over a billion requests a day!), application and information security, and porting enterprise, Java-only libraries to Python. Cory Benfield is an open source Python developer heavily involved in the Python HTTP community. He's a Requests core contributor, a urllib3 core contributor, and the lead maintainer of the Hyper Project, a collection of HTTP and HTTP/2 tools for Python. For his sins, he also helps out with the Python Cryptographic Authority on PyOpenSSL. Brian Warner is a security engineer and software developer, having worked at Mozilla on Firefox Sync, the Add-On SDK, and Persona. He is co-founder of the Tahoe-LAFS distributed secure filesystem, and develops secure storage and communication tools. Moshe Zadka has been part of the open source community since 1995, made his first core Python contributions in 1998 and is a founding member of the Twisted open source project. He also loves to teach Twisted and Python, having given tutorials at several conferences as well regularly blogging. Dustin J. Mitchell has contributed to Buildbot and is a member of the TaskCluster team at Mozilla, having also worked on the Release Engineering, Release Operations, and Infrstructure teams. Pierre Tardy is a Continuous Integration Specialist with Renault Software Labs, and is currently the lead committer for Buildbot