Living near Boston means I hear more than enough about the Irish in Boston, the Kennedys in Boston, and crony politics in Boston. Thus when I meet with these Boston tropes in fiction, my resistance goes way up. In this case, I simply could not fight my way past my prejudices. I will have to leave to others the pleasure of reading If Angels Fight, by Richard Bowes, which I believe contains a poignant story about a lost boy and his guardian angel.
For a SF story set in Boston that’s more to my taste, I choose Zodiac, by Neal Stephenson. (Preemptive further reading!)