Well European History is very interesting but lengthy subject as compared to other histories. Europe Since Nepolean (by Thomsan) is very good book 4 general study of eu history but its not so good by exam point of view. if u really want to opt it then u should check European History by Raghubir Diyal and also A book Aspects of European History by Stephen J Lee. these r very useful by the exam point of view. just check them out