A new sefer called Tevunos HaTorah has recently been published. The sefer explores different Breslov customs and their sources in Halacha and Kabbalah and more explanations about them and how Breslov chassidim follow them.
Some of the topics discussed are:
Clapping hands during davening
Saying Tehillim and Likutei Tefillos at night
Going out to do Hisbodedus in the fields alone
Going into the Tzion of Rabbeinu a few times in one day
Leaving Eretz Yisroel to go to Uman
and much more!
This sefer was written by the Mashpiah Rav Moshe Nachman Krieger from Manchester.