Arthāntara by Candrakānta Śeṭha. Mumbaī : Āra. Āra. Śeṭha, 1978. From the University of Chicago Library.
અર્થાન્તર Arthantar, by ચંદ્રકાન્ત શેઠ Chandrakant Sheth.
The translation of this Gujarati page says that Chandrakant Sheth was a poet, essayist, critic, scholar, and teacher, and that “Arthantara” contains prose and theoretical questions.
Apparently, in Sanskrit, “arthantara” means “opposite, or another, meaning”. Which would explain the reflected lettering on the cover! (the title is the purple second row, the flipped reflection is the green on top) This is probably the most abstractly geometric Indic lettering I’ve seen!