Hi,
Looking for the above in hard or paper back.
Know it's available on line here , but can't be ar....ed to print out hundreds of pages.
Like the feel of a book - bit of a dinasore really
The Arduino language is C++.
Huge number of books on that topic.
If I take your title literally I suspect it does not exist in printed form or even as a single printable document.
Most computer programming reference material nowadays is just available on the internet.
There are many books on the C/C++ language but a lot of what constitutes the Arduino system is contained in code libraries that simplify many tasks - for example the Servo library. The Learning/Reference link at the top of this page will take you to the documentation for the standard features.
One problem with Open Source programs is that documentation is seldom as comprehensive as for commercial software. In many cases there is almost no documentation other than reading the source code - which is not easy to follow if you are a beginner. Programmers obviously prefer writing code to writing documentation 
But then, the programs are free and are probably every bit as good as the expensive commercial programs.
...R