Whether you know it or not, you're really concerned about health care. If you care about people, or money, or even if you only care about yourself, this is your issue. Dean's new book, Howard Dean's Prescription for Real Healthcare Reform, clearly explains what's wrong with the system and how we should fix it. It's okay to be overwhelmed by the complexity of this issue, but it's your duty as a human being to do something about it. This is your best opportunity to start learning about this fall's biggest political battle. (Town Hall, 1119 Eighth Ave, www.brownpapertickets.com. 7 pm, $5.)