Books below are 7zipped which means you need the free and very good 7z archiver,
which also unpacks all other common compressing formats.
Get it here from the 7z homepage!
GS_medium.bin (*Polyglot book for bookless programs against programs with books, max depth 30 plies) => version 091230
Rybka.bin (*Polyglot book made for Rybka and Shredder, max depth 40 plies) => version 091230
GS_Alaric_11f.book (Alaric main book, max depth 40 plies) => version 091230
Info: All interim downloads are already moved to the computerchesswiki(CCW)