Rabbi Avi Zakutinsky is the author of the Hebrew Seforim Umekareiv Biyamin (2 volumes) on halachic questions posed to those in kiruv. He currently teaches at Yeshivas Hashevaynu in Queens. You can see more of his writings on halacha at halachablog.com. If you have any questions or comments, please email him at [email protected] 

https://www.hashevaynu.org/rabbi-avi-zakutinsky