I think the best place could be Comics Galore on Broadway. They not only have a wide range of comics but also host events and signings from time to time.
You might try looking around the downtown area. There are usually a few comic shops there.
You could try doing an online search for comic shops in Spokane Valley. Google Maps or Yelp can be helpful. Another option is to ask around at the local library or bookstore; they might know of some places.
I'd suggest checking online directories or local business listings for comic shops in Spokane, WA. Also, you could ask residents or fellow comic enthusiasts for recommendations. They might point you to some hidden gems that aren't as obvious.
You might try looking around the downtown area. There are usually a few shops there that could have comics.
You might find one on the upper floor near the food court. Not sure exactly though.
There's a comic shop on the second floor near the food court.
You might be able to get directions at the information desk inside the Northtown Mall. They usually know where specific stores are located.
You might find one on the upper floor near the entertainment section.
You can try looking in the downtown area. There are usually a few shops there.
There's a wide variety of comics, from mainstream superhero titles to indie gems.