The October Circle - Robert Littell

Connoisseurs of the literary spy thriller rank Robert Littell, the
bestselling author of The Company, with John le Carré, Graham
Greene, and Alan Furst in the first tier of the genre's pantheon.
Set against the backdrop of the Russian invasion of Prague, The
October Circle is one of Littell's most riveting early works. Seven
of Bulgaria's cultural elite-all disillusioned communists-and one
American drifter find themselves staging an extremely dangerous
protest that will set off a wave of repression and threatens to
repay their heroism with death.