amazon (no ref): https://www.amazon.com/dp/0143108271

in case anyone has the same issues I did finding it.

https://www.amazon.com/Master-Margarita-50th-Anniversary-Pen...

And they did the Penguin 50 yr anniversary edition [1]. It has some useful notes at the end, too.

I found the notes in the Annotated Lolita [2] very helpful, unfortunately I haven't really found an annotated version of M&M (beyond what's in [1]).

[1] https://www.amazon.com/dp/0143108271

[2] https://www.amazon.com/Annotated-Lolita-Revised-Updated/dp/0...