i bought the complete works of dharampal from there on a visit to chennai.
they have a whole range of books on environmentally conscious agriculture, etc. which use age-old techniques.
there's a great book by a japanese architect on the temple architecture of india, considered a classic. i should buy that too one of these days.
and then there's the goan guy (i forget his name, is it richard crasta?) whose critique of whites and white-wannabe indians is one of the most forceful i have ever read. i think it's 'impressing the whites'.