Gateway to Thera — Jeffrey Allen Davis

Half of our heroes are missing. After a warehouse explosion, Jamie, Buster, Yoshi, Shawna, George, Deck, Max and Alex are presumed dead, leaving a more ruthless and brutal ADVENTURE to hunt down the street gang who was responsible for luring them there. But Steve Adams was in the warehouse, too. And he knows the truth. His brother and friends are not dead. They stepped through a gateway to another world, where they have their own battle to fight. Can the genius figure a way to convince Dave and the others that their friends are alive and that they need to retrieve the two coins that open the portal to bring them home?