'This handbook fills a real need. Research in physics education consistently shows that women often step away from the field not for any lack of ability, but because the culture leads them to doubt that they belong: capable women routinely report lower self-efficacy than male peers who are performing less well. Berry, McCullough, and Porter turn that evidence into clear, actionable guidance women can use right now, paired with candid stories from physicists who have navigated these challenges themselves. The question-and-answer format lets readers find help exactly when they need it. I recommend it warmly to students, researchers, and everyone who mentors women in physics.' Chandralekha Singh, Distinguished Professor, University of Pittsburgh