Newman explores a wealth of case studies in French, English, and Latin texts that concentrate on instances of paradox, collision, and convergence. She convincingly and with great clarity demonstrates the widespread applicability of the crossover concept as an analytical tool, examining some very disparate works. Some of these texts are scarcely known to medievalists; others are rarely studied together. Newman's choice of primary works will inspire new questions and set in motion new fields of exploration for medievalists.