WelcometotheirresistibleworldofGreenglassHouse,wherethirteen-year-oldMiloisspendingthewinterholidaysstuckinahousefullofstrangeguestswhoarenotwhattheyseem.Therearefreshcluestouncoverasfriendsoldandnewjoininhissearchforamysteriousmapandafamoussmuggler’slosthaul.Suretothrillbothfansandnewcomers,thissmart,suspensefultaleoffersghosts,friendships,andacastofunforgettablecharacters,allwrappedupinacozymystery.