Oh, BROTHER... hardly anybody on here has a *clue* what "Challenging" even *means*.
Try Wheeler's "Gravitation"... or even any *basic* text on field theory... or Feynman's Freshman Physics lectures at CalTech... there isn't a single piece of "literature", or "fiction", or anything else of the sort that's "Challenging" by comparison - by orders of magnitude
Try Wheeler's "Gravitation"... or even any *basic* text on field theory... or Feynman's
Freshman Physics lectures at CalTech... there isn't a single piece of "literature", or "fiction", or anything else of the sort that's "Challenging" by comparison - by orders of magnitude