The Elf Conspiracy

Every Christmas Eve for a thousand years, Kris Kringle has crossed the dimensional rift between his universe and ours to bring gifts to children. Knowing the potential harm that unbridled human curiosity could do to his world, Kringle has placed secret operatives in key human organizations such as the Pentagon and Central Intelligence Agency. Their job is to conceal evidence of the alternate world and preserve the protective myth. But when four teenager hackers, Harald, Bart, Princess, and Shugger, discover the rift and plan to reveal its existence, Kringle and his special agents must act quickly.
To make the situation worse, a rebellious elf is planning to oust the old man and take Christmas over. And if that’s not bad enough, demons in a third universe are eagerly watching for their chance to launch a genocidal attack against Kringle’s world – and ours.