There are two great bookstores withing walking distance of the University of Washington train station : the University book store and the Amazon bookstore. There are smaller second-hand bookstores in the University District as well.
Today, I walked to the Capitol Hill station, and Bryan (friend) and I took the new light rail extension to the University of Washington. It’s a bit of a walk (a mile) to the Amazon bookstore from there, but hey, walking is good exercise, right?
On Monday mornings, I have to leave the house just a little too early to be able to take the train to the airport (so I take a taxi or Uber car instead) .. but when I come in to the airport on Thursdays, I can take the train all the way up to Capitol Hill.