If you're searching for some summer reading, Amazon's Best Books of the Year So Far For 2014 is a pretty good place to start.
Led by Roberto Aguirre-Sacasa and Francesco Francavilla's Afterlife With Archie: Escape From Riverdale, the Comics & Graphic Novels division is as diverse as you'd probably expect, with entries ranging from Jonathan Hickman and Nick Dragotta's East of West to Mariko Tamaki and Jillian Tamaki's This One Summer to Roz Chast's Can't We Talk About Something More Pleasant?
And yes, there are superhero titles, with spots for X-Men: Battle of the Atom, Wonder Woman, Marvel's Miracleman reprints and, depending how you view it, Mike Mignola's Hellboy in Hell.
There are 15 entries in all, arranged in order of sales (with Chast's memoir at the top, followed by the third volume of Brian K. Vaughan and Fiona Staples' Saga, and the first volume of Matt Fraction and Chip Zdarsky's Sex Criminals). I'm not sure what that tells us -- beyond, say, that the second volume of East of West apparently has sold more copies than X-Men: Battle of the Atom, in a shorter period -- but it may be a semi-interesting glimpse into the tastes/habits of Amazon customers.