ill go with Neville ChaimBerlin.
for more research on this wonderfull chassidic sect, all you need is one website “breslov . org” (breslov research institute)
they will answrere any question you have, research books, classes, and loads more. you know rabbi aryeh kaplan zt”l? he very involved in the BRI before he passed on. he authored/traslated – and you may google these books – the following for the BRI: rabbi nachmans wisdom, outpouring of the soul,
untill the mashiach, rabbi nachmans storries…
he also mentions rabbi nachman of breslev (everyone spells it diffarent) in numerous works of his.
(dont hate them, but stay away from the philosophy of the “na nachs”.. you may research them too if you would like to see the diffarence)
all the best!