Dereliction of Duty: Lyndon Johnson, Robert McNamara, The Joint Chiefs of Staff, and the Lies that Led to Vietnam by H. R. McMaster, now the National Security Advisor.
I read only a very small part of the book, but it seems quite interesting.
Not IRS e-file but NTA e-Tax
If you are living in Japan, you will also be interested in e-Tax services provided by the National Tax Agency of Japan.
However, you may encounter some problems if you only have the latest macOS and Safari at the stage of transmitting the information concerning your Individual Number Card.
The trick is not to use Safari but use Firefox instead!
MacTex
MacTeX is an OS X install package for TeX Live.
You can use various online latex equation editors to get the image of the equations you wish to display, but having a complete set locally is a nice thing.