Zinc is a superb HTTP client/Server library. It is developed by Sven van Caekenberghe and provides high quality code and use.
This book is the documentation related to such an important software libraries.
The current material has been extracted from the book "Entreprise Pharo" so that it can be incrementally used and enhanced.
The result from the latest successful Travis build can be found in the release panel https://github.com/SquareBracketAssociates/Booklet-ZincHTTP/releases