Publishers will never admit it on the record but the market for pirated books is one of the best proxies for judging people's reading habits. Most offerings on this efficient grey market tend to be best-selling novels (including the occasional Booker winner) and popular self-help books (for example, Who Moved My Cheese? and The Monk Who Sold His Ferrari). Recently, however, the reading public appears to have evolved in another direction. Seen on the piles displayed by roadside hawkers is Jugaad Innovation, the 2012 management book by Navi Radjou, Jaideep Prabhu and Simone Ahuja. More interestingly, this book was released in this parallel market at the same time as Random House launched the sequel Frugal Innovation earlier this year. That could be called the ultimate in jugaad marketing.