New: Grandmaster Repertoire 4 & 5

New volumes in the Grandmaster Repertoire Series.

Mihail Marin has completed his opening repertoire for White with 1.c4. Grandmaster Repertoire 3 - The English Opening vol. 2 covers Black's replies to 1.c4 except 1...e5 and 1...c5. Grandmaster Repertoire 4 - The English Opening vol. 3 covers 1.c4 c5.

State-of-the-art theory and hundreds of novelties!