>But, if there are especially interesting niche topics in "slower than light, bigger than atoms" physics, I'm open to that.
fluid mechanics
http://www.amazon.com/Vorticity-Incompressible-Cambridge-Applied-Mathematics/dp/0521639484
http://www.amazon.com/Topological-Methods-Hydrodynamics-Mathematical-Sciences/dp/038794947X
Control theory and classical mechanics: https://www.math.rutgers.edu/~sontag/mct.html
http://www.amazon.com/Foundations-Mechanics-AMS-Chelsea-Publishing/dp/0821844385 http://www.amazon.com/Geometric-Control-Mechanical-Systems-Mathematics/dp/0387221956 http://www.amazon.com/Geometric-Mechanics-Dynamics-Symmetry-Edition/dp/184816775X