R’ Shmuel is the son of R’ Mordechai Kamenetzky (of Yeshiva of South Shore) a grandson of Rav Binyamin Kamenetzky. He has written in various newspapers and magazines. He writes a weekly email as well gleaned from the drashos of his grandfather. Unlike many of the people who write letters, he does indeed sign his name. He is in his late 30s. Indeed that branch of the Kamenetzky family spells their name with a z not an s. (Reb Shmuel and Reb Binyamin went to different judges each Americanized the Lithuanian Kamenecki, according to their own whim. Thus the different spellings. (Fun Fact)