1. Painting a very broad brush, as in half of Eurasian philosophy, check out Chakravarthi Ram-Prasad's 'Eastern Philosophy' [1].
2. More technical, but a valuable introduction to analytic methods in classical Indian thought: Jonardon Ganeri's 'Philosophy in Classical India: An Introduction and Analysis' [2]
These are, of course, scholars writing in a scholarly vein. Two books about Guru figures with deep spiritual experience are:
3. Sri Ramakrishna Kathamrita, translated into English as 'The Gospel of Sri Ramakrishna'[3]
4. Talks with Sri Ramana Maharshi [4]
Finally, to take a comparative route:
5. Roberto Calasso's 'Ka' which is his take on the Vedic-Puranic-Itihasic Corpus as a whole [5].
and to understand how India meets Greece via Persepolis and Egypt:
6. Thomas McEvilley's 'Shape of Ancient Thought' [6]
2. More technical, but a valuable introduction to analytic methods in classical Indian thought: Jonardon Ganeri's 'Philosophy in Classical India: An Introduction and Analysis' [2]
These are, of course, scholars writing in a scholarly vein. Two books about Guru figures with deep spiritual experience are:
3. Sri Ramakrishna Kathamrita, translated into English as 'The Gospel of Sri Ramakrishna'[3]
4. Talks with Sri Ramana Maharshi [4]
Finally, to take a comparative route:
5. Roberto Calasso's 'Ka' which is his take on the Vedic-Puranic-Itihasic Corpus as a whole [5].
and to understand how India meets Greece via Persepolis and Egypt:
6. Thomas McEvilley's 'Shape of Ancient Thought' [6]
[1] https://www.amazon.com/Eastern-Philosophy-Dr-Chakravarthi-Ra...
[2] https://www.amazon.com/Philosophy-Classical-India-Introducti...
[3] https://www.amazon.com/Gospel-Sri-Ramakrishna-Swami-Nikhilan...
[4] https://www.amazon.com/Talks-Ramana-Maharshi-Realizing-Happi...
[5] https://www.amazon.com/Ka-Stories-Mind-Gods-India/dp/0679451...
[6]https://www.amazon.com/Shape-Ancient-Thought-Comparative-Phi...