Literature
Coarse graining
macroscopic electromagnetism: textbook by Jackson
short wavelength approximation: textbooks by Maggiore, or Misner, Thorne, Wheeler.
path integral: textbook by Huang on quantum field theory
Effective field theory applied to compact binaries
original paper: arXiv:hep-th/0409156
reviews: arXiv:1309.3474, arXiv:1601.04914, arXiv:1807.01699
public code: arXiv:1705.06309
Effective One Body
original paper: arXiv:gr-qc/9811091
review: doi:10.1007/978-3-319-19416-5_7
energy map: arXiv:1003.0390