Relay

There's not much different than what this store offers that you'd expect from an airport bookstore: Expensive books (but I've got to say they had a LOT of choice here - not all just mainstream authors, there was a surprisingly large non-fiction section too which was great), the normal range of magazines you could have bought at Coles before you arrived for less; snacks that cost too much; and a few chemist-y type goods including travel sickness tablets incase you didn't remember you get travel sickness before getting to the airport...though the prices might make you think twice.
So it's OK but most 'customers' I noticed were just like me - browsing because they'd already saved many a dollar by buying before hitting the airport.