We stumbled across this establishment because we were interested in checking out the guitar shop in the same mall - and the restaurant previously known as SuperMex (now Jalisco Cantino).
As a burgeoning online used bookseller myself - I have to say that this is the best used bookstore in Vegas (IMHO). Love the staff, attitude and selection (my personal habit is vintage cookbooks of which they have plenty). Welcoming and friendly - it's everything a used bookstore should aspire to be!