Chess eBook - Lev Polugaevsky - El Laberinto Siciliano, Vol.1 (Spanish)
Chess eBook - Alexander Suetin - How to Play the Openings (3rd Ed. 1981, Russian)
Comprehensive Chess Endings - Yuri L Averbach
Chess eBook by Caissa Lovers - Fred Reinfeld - Hypermodern Chess
Chess eBook - Tigran Petrosian - Chess Lectures (1989, Russian)
ebook.chess.ajedrez.La Práctica de Mi Sistema
Chess eBook - Nunn - The Classical King Indian
CAISSA - Middle Game in Chess by Eugene a Znosko Borovsky by PIRASOFT