Thanks a lot Leonidas!
Interactive chess manuals for Fritz12?

There is a large database of ChessBase on the Internet, but i do not know if it's against forum rules to post the link here. This database contains e-books for ChessBase of every part of the game -openings, tactics, strategy, endgame- at different levels of difficulty.
Send me a message and i can give you the link.
Hi everyone, I recently bought Fritz12 and wanted to know if there are a few of the interactive guides (manuals, books or guides of chess) to be used directly on Fritz12, that Fritz12 can open and use. There is something in ChessBase format? at least I think this is the correct format.
Thank you all in advance.