Lars Schandorff: Playing the Queen's Gambit, Quality Chess. He explains the ideas really well, has a god selection of variations and lots of commentated games, where you can se the result of the openings.
book recommendation for Queens Gambit

Yes the book is unfortunately sold out. But Quality Chess sells a digital version: https://www.qualitychess.co.uk/products/1/150/playing_1d4_-_the_queens_gambit_by_lars_schandorff/
If you don't want it digital maybe this could be interesting: https://www.qualitychess.co.uk/products/1/274/grandmaster_repertoire_1b_-_the_queens_gambit_by_boris_avrukh/

1 book?
Accepted, Declined, Semi-Slav...that's a big book
I have some old Sadler books, Everyman might have some newer stuff but not sure how in depth your looking to go

I know its not a technically a book...but Gary Kasparov's DVD on the Queens Gambit is a pretty good overview and also quite entertaining. It mostly just covers the QGD though.

Good Chess Openings Books For Beginners and Beyond...
https://www.chess.com/blog/RussBell/good-chess-openings-books-for-beginners-and-beyond
search 'queen's gambit'
Can anyone recommend a good book for the Queens Gambit Opening?
Thank you in anticipation of any advice.