Remember when it was hard to come by details about NIN releases? As fun as the hunt sometimes was, I really appreciate how nin.com gets right to the point these days, so I'm going to just quote them here:
The score will be available in three unique volumes, released at strategic times over the rollout of the series. The only physical media will be 180g vinyl.
Created in collaboration with the show’s writers, each LP features the score from Academy Award Winners Trent Reznor and Atticus Ross, as well as artwork and packaging exclusive to this vinyl release that explores the culture of Watchmen America and provides revealing insights into the saga’s mythology and mysteries
The artwork for each volume will be revealed as each volume is reelased, and the official store actually links to a special Amazon pre-order page, where each vinyl album is $25.98. It's worth noting that while the artwork is unique for the vinyl releases, what you pre-order is going to be the same as what becomes available in stores later this year.
Release dates are November 4, November 25, and December 16, and have 15 tracks, 13 tracks, and 11 tracks, respective to the order of release.