"Wolf sentinel about" most likely refers to the book Wolf: Sentinel Security, Book 1, which is about a former Navy SEAL, Nick "Wolf" Garrick, who pretends to be his best friend's sister's lover to protect her from death threats. The term could also refer to a "Sentinel Wolf," a type of enemy in the video games DOOM Eternal and Elden Ring, or "Wolf Sentinel," an enemy in the video game Black Myth: Wukong.