In celebration of Cinco de Mayo, the Kirschner Collection and Magrath Library are giving away a copy of University of Minnesota professor Jeffrey M. Pilcher's Planet Taco: A Global History of Mexican Food. To enter the giveaway, leave a comment on this blog post with your name and favorite taco filling by 11:59pm (CST) on Sunday May 5, 2013. We will select a winner at random and announce the results on Monday. You must be able to pick up the book at Magrath Library if you win. Only one entry per person, please.