Hans Trefousse wrote a very good biography of Andrew Johnson that details his battles with Sumner, Stevens and the Radicals over reconstruction.
Something that explores a bit of the end of reconstruction is Roy Morris, Jr.'s book "Fraud of the Century" about the Hayes-Tilden election.
Thanks. I haven't been able to find much on the subject of Reconstruction, tho i've looked. I will check out what you recommended.