+1 for Wald - MTW is great, but it's really dense, and takes some odd approaches that are not really common in the field. Wald stays lean and tight, while still

+1 for Wald - MTW is great, but it's really dense, and takes some odd approaches that are not really common in the field. Wald stays lean and tight, while still covering the important stuff. You'll probably find MTW a lot more approachable after working through a few less beastly texts.