Paper Girls, Volume 3: 12/07/17
Paper Girls Volume 3 by Brian K. Vaughan collects issues eleven through fifteen. The teens are now somewhen else in time. I read it as being the far future but the time traveler who meets up with them says it's the far past.
Mostly this sequence focuses on helping a local save her child. He is the product of rape by one of the three brutes. Beyond the how to get home and what's going on plot, there is some serious discussion of what it means to be a child, an adult, surviving abuse.
Then on the scifi side of things, there is the when are we, what's going on and how do we get home? We learn where the message from volume two comes from.
Volume four which collects issues sixteen through twenty comes out on April 10, 2018.