6 books in series

Letter 44

Letter 44 is a 6-book series with 6 primary works first released in 2014 with contributions by Charles Soule.

Letter 44, Volume 1: Escape Velocity
Letter 44, Volume 2: Redshift
Letter 44, Volume 3: Dark Matter
Letter 44, Volume 4: Saviors
Letter 44, Volume 5: Blueshift
Letter 44, Vol. 6: The End