If you're unable to find a free PDF and are interested in learning differential geometry, consider:
: While this exact edition may not be available for direct download, the archive hosts similar foundational texts and earlier editions of Differential Geometry that can be borrowed or streamed. Purchase Options differential geometry by mittal and agarwal pdf free link
: Designed primarily for M.A., M.Sc., and Honours students. Core Strengths : If you're unable to find a free PDF