"Hollow World: Origins" is a collection of three prequels to the novel "Hollow World" by Nick Pobursky. This anthology features the following stories:

"X-ray" - The top-secret X-ray Team has a new mission: to retrieve a captured agent before he cracks under a terrorist group's interrogation. Deadly force authorized. 

"Overboard" - Detective Charlie Walker's boss assigns him to an off-the-record weekend investigation: to determine if his future son-in-law is a scumbag.

"Vacuous" - Hit man Jeremy gets in over his head with the most dangerous and cunning nemesis he's ever faced: his girlfriend.