The four core rulebooks for 5th Edition D&D are:

The four core rulebooks for 5th Edition D&D are:
– the player’s handbook
– the monster manual
– the dungeon master’s guide
– jeremy crawford’s twitter account

— adam koebel (@skinnyghost) March 14, 2018

The vast majority of his responses seem to be some variant of “The rule does what it says it does,” or “Here is he page reference for this rule that exists.”

— Rodney Thompson (@AntarianRanger) March 14, 2018

I believe that is Jeremy’s most frequent response.It is a good and valuable response. The man is among the best of us.

— Rodney Thompson (@AntarianRanger) March 14, 2018