1) Igud HaRabbonim is proud to make available Sha’arei Halacha on Purim, a booklet on the laws of Purim, written by the organization’s Moreh Tzedek, HoRav Leibel Wulliger shlit”a.
2) Below is a 5782 collection of halachic essays published by Igud HaRabbonim, the Rabbinical Alliance of America, featuring articles by Rabbi Ya’akov Klass, Rabbi Yehoshua Grunwald, Rabbi Zevi Saunders, Rabbi Ephraim Glatt, esq., and Rabbi Gil Student.
Halachic Discussions volume 2 issue 1 Purim 5782
3) Below is a sefer on Hilchos Purim based on the psakim of Rav Yaakov Ariel shlit”a.