Let me start off by saying I’m having a blast playing this game. I’ve Played BG 1 & 2 for like 20 years regularly, and was always intrigued by the Forgotten Realms.
So about four years ago, I’ve bought a bundle off the first 30 books about Drizzt Do’Urden, a Drow Ranger, by R. A. Salvatore. If you did not know about these books, I’d like to recommend them wholeheartedly to you, if you love the world of BG3. The books are true to the material, and offer deep insights into Faerûn.
They have their ups and downs, but I’ve read 14 books so far, and I’ve been deeply involved so far.
I started with the dark elf trilogy and then went back to read the Icewind Dale trilogy afterwards. I do remember thinking that RA Salvatore’s writing improved between the two.
It’s been a while since I read them, but from what I remember it the feel of them, I think the Icewind Dale trilogy was Salvatore writing about a D&D campaign he was in (either as GM or as Drizzt’s PC, maybe both), and the dark elf trilogy was the back story he wrote for the character.