My books for the start of the B-s are:

Bahamas — God’s Angry Babies by Ian Strachan (recommended)

Bahrain — QuixotiQ by Ali Al Saaed (pretty terrible, but written in English, not a translation)

Bangladesh — A Golden Age by Tahmima Anam (not great writing, but fits the international literature pattern)

Bermuda — The Man who Loved Funerals by Frank Collymore (haven’t read it yet)

Belarus — Live Until Dawn by Vasil Bykau (haven’t read it yet)