Sin and Piety

"Sin and Piety" is a collection of essays describing bhakti-yoga, the science of self-realization, and Krishna consciousness based off select verses from sacred Vedic texts like Bhagavad-gita, Ramayana, Chaitanya Charitamrita, and others.  Estimated length of 236 pages. "The activities or desires that relatively help a soul attain his constitutional position are called piety. The opposite are called sin.
Since devotional service to Krishna is one's constitutional position, when one cultivates this service, then nescience, which is the root cause of relative situations in the form of sin and piety, is gradually fried and abolished." (Shrila Bhaktivinoda Thakura, Shri Krishna Samhita, 10.2 Purport)