YogVidya Store › Classwork Book 2 Image 1 of 1 Classwork Book 2 £8.00 Precepts, Concepts, Schemes, Themes and Perspectives in Asana and Pranayama by Prashant Iyengar. Quantity: Add To Cart Added! Precepts, Concepts, Schemes, Themes and Perspectives in Asana and Pranayama by Prashant Iyengar.