* Added Exploring Modern Fortran Basics

Hi,

Stjepan from Manning here. I thought this title might be a good match for your list. Thank you for considering it.

Best,

* Added Exploring Math for Programmers...

Hi, 

Stjepan from Manning here. I thought this title might be a good match for your list. Thank you for considering it.

Best,

* address linter issues
Co-authored-by: NEric Hellman <eric@hellman.net>