To determine the author of the book "Economy of Permanence," we need to identify among the given options:
- Vinayak Narahari "Vinoba" Bhave
- “Lokamanya” Bal Gangadhar Tilak
- Murlidhar Devidas “Baba” Amte
- Joseph Chelladurai Cornelius “JC” Kumarappa
- “Diwan Bahadur” Rettamalai Srinivasan
From these, Joseph Chelladurai Cornelius “JC” Kumarappa is recognized as the author of "Economy of Permanence." Known for his economic writings, Kumarappa was instrumental in developing the concept of Gandhian economics and sustainability. His work emphasized the importance of creating an economy that contributes to permanent and peaceful development.