What if you could buy a memory or a skill? What if the implantation process had risks? The engrams map to certain areas of the brain. The recipient’s brain is over-written in these areas and the recipient may lose some of their own memories/skills. Who would take the risks and why?
You find a magic marker that allows you to draw a door to any place on earth. Once drawn, the door is permanent and can be used by anyone.
An unusual murder on a world where nearly everyone is a telepath. The investigation is lead by an eccentric detective who has no telepathic ability.
A world where oceanic farmers and ranchers provide food and raw materials for an overpopulated planet.