The Codex back issue releases continue apace! Ectoplasm is now available on DriveThru RPG for three bucks. It features Huge Problems in Little Shanghai, The Ghost playbook for The Sprawl, Thirteen Haunted Magic Items for Dungeon World, and Three Dozen Signs of Ghostly Habitation.
http://www.drivethrurpg.com/product/234800/Codex–Ectoplasm-Nov-2016?src=newest_since