This is a terrific book. I purchased a subscription to Safari Books Online in large part due to wanting to read this. I was writing an app and was considering u

This is a terrific book. I purchased a subscription to Safari Books Online in large part due to wanting to read this. I was writing an app and was considering using Websockets, but realized I didn't know much about them and this book helped to lay out their mechanics. That, and so much more is in the book.