Chess Skills: Defensive Resources

Chess Defense - Chess Terms

Short & Sweet: Plichta's French Defense

100 “Defensive” Chess Puzzles for Expert Players (Rating 1800-2100): 100 real-life chess tactics puzzles to make you a better player (Chess Puzzles, Strategy and Tactics - Defensive Moves): Puzzles, Mr Chess: 9781789338935: : Books

The Robatsch Defense: Unraveling the Secrets of a Hypermodern Chess Opening

The Endless Charm of Chess- Endgame

Learn Chess Tactics by Nunn, John

I have read 5 great books on chess openings. This is what they taught me.

Chess Courses created by Grandmasters

How to Defend in Chess — 7 Most Important Defense Principles - TheChessWorld