Found 2 books

The Definitive Guide to HTML5 WebSocket

[en] The Definitive Guide to HTML5 WebSocket Apress

Vanessa Wang & Frank Salim & Peter Moskovits

download read it!
The Definitive Guide to HTML5 WebSocket

[en] The Definitive Guide to HTML5 WebSocket Apress

Wang, Vanessa & Salim, Frank & Moskovits, Peter

download read it!