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.
There, Linus must somehow determine if they could bring on the end of days. But their guardian, charming and enigmatic Arthur Parnassus, will do anything to protect his wards. As Arthur and Linus grow ever closer. Linus must choose between duty and his dreams.