There may be many who wish to find out more about Indian Philosophy but are put off by the Sanskrit jargon which surrounds it, pretty but prickly like a Berberis hedge. It keeps common cattle off of course. A good introduction to the problem of perceptual error, illusion, confusion and delusion is an essay in a collection that is available on Internet Archive, Contemporary Indian Philosophy by Various Authors
Contemporary Indian Philosophy
(note: the epub version is clean) pub. 1950 in a revised and extended edition.
The Problem of Truth by M. Hiriyanna is an exposition along classical Vedanta lines which avoids having to learn the rudiments of philosophy bazaar Sanskrit. The philologically minded may deplore this but philosophy isn’t poetry, it’s not lost in translation. In any case that classic text Vedanta Paribhasa by Dharmaraja Adhvarindra who flourished in the 17th.century seems to be the guiding light. It is also available on internet archive and a more modern version with glossary translated by Swami Madhavananda is (pdf)
Take a break from malign demons.