A group of DC DOUBLE DOUBLE comics published by Thorpe and Porter ADVENTURE DOUBLE DOUBLE COMICS #1, ACTION DOUBLE DOUBLE COMICS #3, DETECTIVE DOUBLE DOUBLE COMICS #3, ACTION DOUBLE DOUBLE COMICS #4. Each comic is made up of unsold DC comics that were returned to the publishers and re-bound in groups of 4 comics put together, hence the 'double double', meaning that even 2 copies of the same double-double comic could have different issues bound within. (4)