Attack With Black by Valery Aveskulov...
Aggressive repertoire for Black based around the Benko, Vaganian and Blumenfeld Gambits...
https://www.amazon.com/Attack-Black-Valery-Aveskulov/dp/1906454396/ref=sr_1_1?crid=CD32ZA38BG3H&keywords=attack+with+black&qid=1553664448&s=books&sprefix=attack+with+black%2Cstripbooks%2C204&sr=1-1
Alterman Gambit Guide - Black Gambits 1 by Boris Alterman......coverage of the same gambits (and more) as in Aveskulov....
https://www.amazon.com/Alterman-Gambit-Guide-Black-Gambits/dp/1906552541/ref=sr_1_fkmrnull_3?keywords=alterman+gambit+guide&qid=1553664622&s=books&sr=1-3-fkmrnull
For online learning, a complete repertoire (one which you can play for a win) against 1.d4 - built around the Benko Gambit - is available on Chessable....
https://www.youtube.com/watch?v=sr5HGef-2jg
https://www.chessable.com/chessexplaineds-benko-repertoire-a-complete-answer-to-1d4/course/3258/
Is this discussion about 1 d4 Nc6 2 d5 Nb8 ?