(Chess Openings. Open Games + Semi-Open Games + Closed Games I + Closed Games II). With 10 per cent discount comparing to particular volumes. The books contain 899 well annotated games, which cover all openings. The games are usually from recent time. Both father and son Bioleks are strong IMs and succesfull trainers. The games are annotated by the authors or by other strong Czech players - Navara, Laznicka, Movsesian, Babula, Stocek, Votava, Vokac, etc. Further description is at particular books. The books are intended for intermediate to advanced players.