Queen’s Gambit books

Queen's gambit declined, by Matthew Sadler, is your friend!
This is THE book!
Perfect answer

More White oriented than the Sadler book?
You're probably going to get into repertoire or opening specific.

Yep - queens gambit by Sadler is an amazing book. Worth noting that it won’t cover the Slav or Semi Slav though - they’re outside the scope of a book on the QG really. However, Sadler has also done separate books on both of those as well, and they’re also superb.
It's a book from 1974 but Samarian's book on QGD is what I studied. It includes Tarrasch, semi-Tarrasch and other deviations. Some lines are out of date, some have holes found by computers but I still find interesting ideas in it [that I always check now].

Yep - queens gambit by Sadler is an amazing book. Worth noting that it won’t cover the Slav or Semi Slav though - they’re outside the scope of a book on the QG really. However, Sadler has also done separate books on both of those as well, and they’re also superb.
Written in the same style also

Strategic Chess by Edmar Mednis is a book of 30 annotated games in d-pawn openings, not just Queen’s Gambit, but comes consistently highly recommended.
Sadler’s book covers only the Queen’s Gambit Declined only, but is one of the best, if not the best, chess book in my opinion. Neil McDonald’s Starting Out: The Queen’s Gambit Declined is also good, but likewise covers only the QGD.
First Steps: The Queen’s Gambit by Andrew Martin might be a decent place to start. Haven’t heard anything good or bad about this book. Same with John Shaw’s Starting Out: The Queen’s Gambit.

Strategic Chess by Edmar Mednis is a book of 30 annotated games in d-pawn openings, not just Queen’s Gambit, but comes consistently highly recommended.
Sadler’s book covers only the Queen’s Gambit Declined only, but is one of the best, if not the best, chess book in my opinion. Neil McDonald’s Starting Out: The Queen’s Gambit Declined is also good, but likewise covers only the QGD.
First Steps: The Queen’s Gambit by Andrew Martin might be a decent place to start. Haven’t heard anything good or bad about this book. Same with John Shaw’s Starting Out: The Queen’s Gambit.
Just was thinking that. Pretty good book.