Atty. Maria Zarah R. Villanueva-Castro is a graduate of San Beda College in 1996 as class valedictorian. Concurrently, she is a professor in her alma mater, a Bar Review Lecturer at San Beda, Legal Edge Review, SSCR- Recoletos (Manila and Cebu). She has currently authored two books, Commercial Law Recap Book 1 & 2, and Take Note: Commercial Law Series.