From the authors of Women Don’t Ask, the groundbreaking book that revealed just how much women lose when they avoid negotiation, here is the action plan that women all over the country requested—a guide to negotiating anything effectively using strategies that feel comfortable to you as a woman.

Whether it’s a raise, that overdue promotion, an exciting new assignment, or even extra help around the house, this four-phase program, backed by years of research and practical success, will sh...