Rabbi Yehonasan Gefen grew up in London. He never imagined becoming a Rabbi, and certainly did not see himself as someone teaching Torah to hundreds of people worldwide. Yet, after twenty years of intensive learning, Rabbi Gefen found his calling as a disseminator of Halacha, with particular focus on the wide-ranging and highly relevant halachos of Shabbos, Bein Adam L'Chaveiro and now Issur v'Heter. It is impossible to properly keep halacha properly without having a thorough knowledge of its myriad laws in a succinct manageable way. Yet how can busy Avrech or a working Ben Torah find the time to grasp halacha at an appropriate level?