Saturday is Free Comic Book Day, in which comic book shops across North America are giving away free comic books.
To find a participating store in your area, follow this link. Here is more about how the event works:
Free Comic Book Day is administered by a panel representing all parts of the comic book industry: retailers, publishers, suppliers, and Diamond Comic Distributors. Each year, publishers apply to provide comic books at cost to retailers, who in turn give them away for free. Diamond handles marketing and logistics for the event, shipping comics to shops and handling marketing and PR for the event.