Today is the first Saturday in May, the annual Free Comic Book Day, when comic book shops have designated comics available for free!
The first FCBD was way back in 2002, and since then publishers create special issues of popular comics or teaser anthologies or reprints and give them away in a bid to generate interest, especially among children and new readers. There are comics for all ages, from kiddies to the grownup collector, from superheroes to indie titles. Here is a list of available titles. As you might expect, some of these books disappear fast.