Great Choice Zuki
There are two superb books available for the latest KN series, written by Alec Pagida. The first is called 'How do I do That', which, although it was originally written for KN6000/6500, the majority of the content still applies to the KN7000.
The second has just recently been published and deals mainly with the new features found on the KN7000. It also includes a CD which is jam packed full of extra styles from past KN series, demos and lots of other useful stuff.
There is also a companion video available with the second book.
All highly recommended to a new Technics owner.
One source of supply in US is http://www.wtenaykeyboardstudios.com/
( Alec - small denomination notes are acceptable