Are you a single guy? Are you hungry? Do you really wish you knew how to cook? If you've answered "yes" to any or all of these three questions, there's definitely a niche cookbook out there for you. This one comes by way of Avi Shemtov, chef and owner of The Chubby Chickpea, a locally sourced falafel-slinging food truck that treads Boston grounds seven days a week.