Screen Rant: Okay, the internet wants to know: are those controversial Baldur's Gate novels canon?
Adam Smith: The Baldur's Gate novelizations? I haven't read them, actually, so I guess not! There's a huge amount of D&D novels I have read. They give me information on, say, the Underdark, or the way a deal with the devil might work, or something. Anything we want to put into the game, we can usually find a sourcebook or a novel that's covered it. So we'll go and read that and see if it gives us new ideas, informed our ideas, or changed some ideas.
SR: Okay, the fandom will be pleased. I haven't read them either, but they made some decisions that people really did not like, from my understanding. They flipped some tables.
AS: I think I've heard some of those flipped tables landing, but I wasn't in the vicinity.
SR: The team caught them and fixed them.
AS: (Laughs) We're 100 years later, so we can also say, hey, maybe some people remember these events a bit differently. Maybe they feel like legends and myths to some people. Some people are going to have different ideas about what happened, but we know it through this.
Lead Writer Adam Smith Interview: Baldur's Gate III (Screen Rant, 2020.02.27)