Recently we have been zocheh to give shiuim in R' Yosef Engel's "Asvan Di-oraisa" which would DEFINITELY qualify as an mind altering drug and would thus make me a drug trafficker. I invite everyone to get high with me.
If Hashem gives me the stength and means I hope בלי נדר to cover most or all of the sefer. It is a "can't-miss" for any male who either has a Jewish mother or who converted to Judaism.
In fact, all of Rav Yosef Engel's writings are intoxicating.
ברוך אלקינו בראנו לכבודו והבדילנו מן התועים ונתן לנו תורת אמת!!