श्रीमद् भगवद् गीता रहस्य-कर्म योग शास्त्र - लोकमान्य बाळ गंगाधर टिळक
The original Geeta Rahasya written by Lokmanya Bal Gangadhar Tilak in 1915.
Geeta Rahasya is the analysis of Karmayoga in the Bhagavad Gita, which is known to be gift of the Vedas and the Upanishads. It includes an external examination of the Gita, the original Sanskrit stanzas, their Marathi translation, commentaries on the stanzas, and a comparison of Eastern with Western doctrines etc.