Information from the Chessbase website:
The Cuban grandmaster Amador Rodriguez introduces six modern, partially rediscovered systems with which Black without extensive theoretical knowledge can cause his opponent some very unpleasant problems. In a number of introductory texts the special points are explained in clear language, suitable for amateurs and experts. The position tree allows you to keep all variations in view, with full statistical information on every move. Training positions are also included so you can practice what you have learnt. Available in the following languages: English, Spanish and German.