What is your definition of happiness?" we ask Khurshed Batliwala. "It's just finding the toilet door open when you really want to go," he replies. His answer isn't surprising given the fact that we're halfway through his new book Happiness Express [Westland Books], which Batliwala has co-authored with Dinesh Ghodke, and we've had a few laughs already. Both authors are Art of Living teachers.

They're also IIT Bombay alumni, so naturally, they're often asked, "How do I get into IIT?" Which is why they came out with Ready, Steady, Go! last year, a guide to smart ways of learning. "But then people asked us, 'How did you manage to get out of IIT?', and then we decided to write Happiness Express," Batliwalla tells us over a phone call from Bengaluru, while he proceeds to expand his original definition. "Happiness can mean different things for different people. For a child, it's a teddy bear while for a teenager it could be their first love," he says.