Purim.

look Inside

Shaarei Orah al Chanukah & Purim : Rabbi DovBer of Lubavitch

look Inside

Sham HaBedolach al Esther, Daniel, Ezra-Nechemia & Shmoneh Essre

look Inside

Shemateta De'Moshe - Rabbi Moshe Feinstien

look Inside

Shiurei Rabbenu HaGaon Rabbi Moshe Shapira - Purim & Chodesh Adar

look Inside

Shvilei Pinchas : Purim & Megilat Esther

look Inside

Siach Chanukah & Purim : Rabbi Chaim Kanievsky

look Inside

Sichot Rabbi Natan Tzvi al Ha-Moadim

look Inside

Sichot Rabbi Shimshon David Pinkus : PURIM

look Inside

Sichot Rabbi Shimshon David Pinkus al Moadim (6 Vol.)

look Inside

Siddur Kavanot Ahavat Shalom : Chanukah & Purim

look Inside

Siddur Rechovot HaNahar - Kavanot Purim

look Inside

Sifrei HaRashash - Ohr HaLevana / Sar Shalom / Kavanot Sfirat HaOmer...

look Inside

Siftei Chaim - Moadim volume 2 (Rabbi Chaim Friedlander)

look Inside

Siftei Chen - Purim & Arbaa Parshiyot (Rabbi Shmuel Krauss)

look Inside

Siftei Chen - Purim & Daled Parshiyot (Rabbi Shmuel Krauss)

look Inside

Simchat Yitzchak al Shaar HaKavanot - Drushei Chanukah & Purim (R' Yitzchak Benzecry)

look Inside

Sod Yesharim al Purim & Daled Parshiyot (R' Gershon Chanoch Henich of Radzin)

look Inside

Talalei Orot - Moadim (5 vol.)

look Inside

Tiv HaKavanot al Shaar HaKavanot : Purim

look Inside

Tiv HaMoadim : Purim (Rabbi Gamliel HaCohen Rabinovitz)

look Inside

Torat Chaim - Perushei HaRishonim al Megillat Esther

look Inside

Tur V'Shulchan Aruch HaChadash Tzurat HaDaf:Orach Chaim #5(Simanim 495-693)

look Inside

U'Matok HaOr al Megillat Esther : Rabbi Shlomo Levinstein

look Inside

Ve'Higadeta - Megillat Esther (Rabbi Yaakov Galinsky)

Yalkut Me'Am Lo'ez : Esther

look Inside

Yalkut Me'Am Lo'ez : Esther [Menukad Edition]

look Inside

Yemaleh Pi Tehilatecha: Yamim Noraim, Chanukah & Purim (Rabbi Shteinman)

look Inside

Yemei Ha-Purim : Rabbi David Cohen

look Inside

Yerushalayim B'Moadeha - Purim (Rabbi Avigdor Neventzal)

look Inside

Yevakshu mi'Pihu : Halachot Purim (Harav Yosef Shalom Elyashiv)