Play Framework is an open source web application framework that is written in Java and Scala. It follows the Model-View-Controller architectural pattern and enables the user to employ Scala for application development, while keeping key properties and features of Play Framework intact. Starting off by building a basic application with minimal features, you get a detailed insight into handling data transactions and designing models in Play. Next, you venture into the concepts of Actors and WebSockets, the process of manipulating data streams, and testing and debugging an application in Play. Finally, you gain an insight into extending the framework by writing custom modules or plugins in Play. Each chapter has a troubleshooting section that helps you out by discussing the causes of, and solutions to, some commonly faced issues.