He closed his copy of MTW.
Black holes, gravitational collapse, the Big Bang, and the early universe (inflation). Recommended Versions & Access Third Edition (2013): Published by Cambridge University Press
The Ohanian PDF is a hidden gem for building physical intuition in general relativity, but it should be supplemented with a modern text like Carroll or Schutz for mathematical fluency. If you find MTW overwhelming, start here—but don’t stop here.
Unlike MTW, which drops you into differential geometry with "Bianchi identities" on page 10, Ohanian eases the reader in. He introduces: