Owned by the Chapter's people, the World's Biggest Bookstore was a giant bookstore before giant bookstores existed. The great thing about having a bookstore this size is that there is a selection to match.
Speaking specifically to the fiction section(s) of the store, I've been able to find pretty much ever book I've looked for here. They've got a respectable selection of graphic novels, too.
My one qualm is that unfortunately the great size has its downsides. Sometimes it's hard to find what you want. Sure, the computer says it's there, but I'll be damned if I see it. Also, I've found the sections to be a bit confusing from time to time. With all their space, they've been able to create lots of sections for specific sub genres, but that's not always good. It's especially annoying when you can't find a book in the fiction section because it's in the 'literature' section.