You just can't seem to find a limit to the number of great things people are saying about Alternate Reality Comics and its owner, Ralph Mathieu.  Vegas' oldest and most diverse comic book shop should be on any visitor's to-do list while they're in Sin City, and if you don't believe that, maybe a few of these comments will convince you...

"This is the best place in Vegas for all your comic-book needs. It has a nearly comprehensive selection, with a heavy emphasis on underground comics. But don't worry -- the superheroes are here, too." -Frommer's

"Alternate Reality is the best pure comic book store in town.  What I like most about the shop is the diversity.  From Marvel/DC to the most eclectic alternate press books, you'll find them here" -yelp.com