The late Callum MacDonald's account is the best available on the assassination of Heydrich, the Nazi "Butcher of Prague". It is meticulously researched, well balanced, perceptive and extremely well written. It traces the origin of the assassination plan to the exiled Czech leader Benes's desire to assert Czech defiance of the German occupation, in the face of the collaborationist tendencies of the government of Hacha and much of the population. The Czechs paid a terrible price for the assassination of Heydrich, including the murder of many innocent people and the wiping out (and thus immortalising) the village of Lidice as part of the predictable Nazi retaliation for Heydrich's death. MacDonald examines the role of SOE in London and traces the course of the assassination plot from the parachute drop near Prague to the nearly botched assassination attempt (the assassin's sten gun jammed but Heydrich fatally stopped his car to pursue the assassins, only to be fatally injured by a bomb thrown at his vehicle). We are then given a detailed and moving account of Nazi retribution and follow the lives of the Czech assassins, holed up in the Cathedral of St Cyril of St Methodius in Prague until their betrayal, gun battle with the Nazis and eventual suicide and martyrdom (do visit the church if you are in Prague, it is a very moving experience).
If you want to read one book on the Heydrich assassination, this is the one. How sad that the gifted author Callum MacDonald died so prematurely; a great loss to History.