Several good titles out there on Salem Witch Trials. Fascinating stuff.
'Salem Possessed' - Paul Boyer and Stephen Nissenbaum
'The Devil in the Shape of a Woman' - Carol Karlsen
'The Devil's Dominion' - Richard Godbeer
'In the Devil's Snare' - Mary Beth Norton
These are all good, but if I were to choose just one I'd go with 'Salem Possessed,' especially since you have better than passing knowledge of early New England colonial history.
One other good early New England history book I'll suggest to you - 'Good Wives: Image and Reality in the Lives of Women in Northern New England, 1650-1750' by Laurel Thatcher Ulrich.
BTW, I read 'Dominion of War.' That's just good stuff.