With its principal place of business in Sta. Mesa Heights, Quezon City, Rex Book Store, Inc. (RBSI) has risen from its humble beginnings on Azcarraga Street (now Claro M. Recto Avenue) to become one of the country's biggest publishers of textbooks and related educational materials and proud of the slogan “The most comprehensive education provider in the Philippines".

It is likewise the place where REX BOOK STORE (RBS) has its new beginning when the previous store was razed to the ground after a conflagration destroyed everything except for the one unblemished prayer book

Jesus, Save me, which gave the Fontelera's and Buhain's the will to go on.