This publication presents a translation of Si Andres Bonifacio at ang Katipunan by Jose P. Santos, a rare and historically significant 1935 Tagalog booklet that sheds light on the life and legacy of Andres Bonifacio. Supported by an academic research grant from the University of Santo Tomas, the project translates Santos’ work, which offers rare insights into Bonifacio’s life, his personal relationships, and his literary contributions, including Pag-ibig sa Tinubuang Bayan and Katapusang Hibik ng Pilipinas. This edition aims to deepen appreciation for Bonifacio’s journey as a self-made leader and his enduring impact on the nation’s history.