A great place to start is at the public library's children's section, which should have a section of graphic novels for younger readers. Let him poke around there and see what interests him.
Sadly I can not recommend most comic stores. With a lot of the stuff they carry and display, they're not set up to get younger comic readers interested in comics. Forbidden Planet in the city does still have a kids section which I can recommend. The Barnes and Noble by me used to have a similar section. But it looks like it has been absorbed into the larger graphic novel section and now has The Walking Dead TPBs rubbing shoulders with Archie TPBs, which makes shopping difficult at best.
Some of the ones listed might be a bit too much to be read by a reading five-year old without some help but they're all ones that we've liked enough to pick up for ourselves after borrowing from the library.
Batman: The Brave and the Bold
Sidekicks (Dan Santat)
Tiny Titans (I was not very keen on these but they were very popular in the summer before Kindergarten.)
Michael Townsend's Amazing Greek Myths of Wonder and Blunders
Fangbone, 3rd Grade Barbarian
Marvel's Oz Books
Usagi Yojimbo (Has stylized violence so look at this one first)
Zita the Space Girl
Binky the Space Cat
Clone Wars Adventures (Dark Horse; like the animated stuff and not the CGI stuff)
For "Real World"
Tintin (Has stylized violence so look at this one first)
Text w/ Graphic Novel Portions:
Super Chicken Nugget Boy
Ricky Ricotta and his Mighty Robot
Last edited by Mysterioso
on Tue Nov 20, 2012 7:34 pm, edited 2 times in total.