Gedolei Yisrael - R. Tzadok HaKohen

R. Tzadok (1823-1900) was a prolific author and a profound thinker. A chassidic Rebbe who was a talmid of the Ishbitzer Rebbe, R. Tzadok grew up as a Litvak and was later convinced to "do teshuvah" and follow chasidut. (A good lesson for all of us, it is never too late to become a chasid!)

R. Tzadok authored many seforim on different subjects and he often discusses Kabbalah. His two works which are the most well known are, "Tzidkut HaTzadik" and "Pri Tzadik". Tzidkut HaTzadik is a discussion of improving your Avodat HaShem, but it is also a perush on Massechet Berachot. Pri Tzadik was actually written down by his students and is a discussion of the Parshah and the Moadim.