The House in the Cerulean Sea

Linus Baker leads a quiet life. At forty, he has a tiny house with a devious cat and his beloved records for company. And at the Department in Charge of Magical Youth, he's spent many dull years monitoring their orphanages.

Then one day, Linus is summoned by Extremely Upper Management and given a highly classified assignment. He must travel to an orphanage where six dangerous children reside - including the Antichrist.