Nine Inch Nails have surprise-released a new album. Ghosts V-VI arrived suddenly this morning, available as a free download from their website. It comprises Ghosts V: Together and Ghosts VI: Locusts. “Hours and hours of music,” Trent Reznor tweeted. “Free. Some of it kind of happy, some not so much.” Listen below.

Parts I-IV in the Ghosts series were released as an album in 2008. It included “34 Ghosts IV,” which was later sampled by producer YoungKio for the track that Lil Nas X eventually made into “Old Town Road.”

Nine Inch Nails’ released Hesitation Marks in 2013 and followed the album with a trilogy of releases: 2016’s Not the Actual Events, 2017’s Add Violence, and 2018’s Bad Witch.

Trent Reznor and Atticus Ross have also written scores for films like Mid90s and Soul, as well as series including HBO’s Watchmen.

Read Pitchfork’s list of “The 33 Best Industrial Albums of All Time.”

Ghosts V: Together:

01 Letting Go While Holding On

02 Together

03 Out in the Open

04 With Faith

05 Apart

06 Your Touch

07 Hope We Can Again

08 Still Right Here

Ghosts VI: Locusts:

01 The Cursed Clock

02 Around Every Corner

03 The Worriment Waltz

04 Run Like Hell

05 When It Happens (Don’t Mind Me)

06 Another Crashed Car

07 Temp Fix

08 Trust Fades

09 A Really Bad Night

10 Your New Normal

11 Just Breathe

12 Right Behind You

13 Turn This Off Please

14 So Tired

15 Almost Dawn