Offerman is great. I bought the book on my way home from the theater to figure out what the fuss is about.
Huntington Theater is right on the Green Line of the MBTA. Closest to the "E" branch, but under a 15 minute walk from the B/C/D lines (there is no A Train). You can drive, but parking will run you anywhere from $12 to $40, depending on where you end up.
Brasserie Jo is very nearby and is extremely well regarded and recommended. It leans towards French but has a big menu with something for everyone and it's a nice space.
Best Italian is in the North End, of course, but Davio's is great and is an easy "T" ride or about a 20 minute walk away.
Not any great Thai or real Mexican nearby that I can think of. Lots of steak and seafood places nearby too, of course.