http://rybkachess.com/index.php?auswahl=DownloadsMore opening Books,
This is what u can find there
Free downloads
2007-12-23 Perfect 13.ctg (a high quality .ctg book by Sedat Canbaz, click here to read more information and the recommended settings)
2007-08-19 Rybka.bkt (Official Rybka book for Shedder Classic interface by Harry Schnapp) (settings )
2007-07-10 HS_for_Rybka.zip (very strong .ctg book tailored for Rybka by Harry Schnapp)
2007-02-01 TurkII.ctg (the second version of the "Turk" opening book by Djordje Vidanovic)
2006-12-30 Sheebar.ctg (a very strong book for Chessbase interfaces by Aung Thura)
2006-11-18 Download Rybka v2.0 Rybka opening book for Arena (FAQ)
2006-09-23 Paradigm.ctg (guest book for Chessbase interfaces) (FAQ with author Dr. Wael Deeb)
2006-06-10 Noomen Testsuite 2006 - an updated version of Jeroen Noomen's set of opening positions. Intended for engine vs engine testing, gives a balanced representation of modern chess.
2006-05-15 Rybka opening book for Arena (FAQ)