Jack Perdu Series by Katherine Marsh

Jack Perdu, a shy ninth grade classics prodigy, lives with his father on the Yale University campus. Smart and introverted, Jack spends most of his time alone, his nose buried in a book. But when Jack suffers a near fatal accident, his life is forever changed. His father sends him to a mysterious doctor in New York City, a place Jack hasn't been since his mother died there eight years ago... moreJack Perdu, a shy ninth grade classics prodigy, lives with his father on the Yale University campus. Smart and introverted, Jack spends most of his time alone, his nose buried in a book. But when Jack suffers a near fatal accident, his life is forever changed. His father sends him to a mysterious doctor in New York City, a place Jack hasn't been since his mother died there eight years ago. While in the city, Jack meets Euri, a young girl who offers to show him the secrets of Grand Central Station. Here, Jack discovers New York's Underworld, a place where those who died in New York reside until they are ready to move on. This, Jack believes, is a chance to see his mother again. But as secrets about Euri's past are revealed, so are the true reasons for Jack's visit to the Underworld. Masterfully told, The Night Tourist weaves together New York City's secret history and its modern-day landscape to create a highly vivid ghost world, full of magical adventure and page-turning action. less

After traveling to the ghostly underworld beneath New York City, Jack has made it back aboveground, to join the living. But if he's alive why is he still seeing ghosts? Jack tries hard to fit in at his new school-and tries even harder to win the affections of his Latin classmate and friend, Cora. In an effort to impress her, Jack leads Cora to the entrance of the underworld and makes a terrible mistake. Soon they have crossed the threshold, and there may be no getting back... moreAfter traveling to the ghostly underworld beneath New York City, Jack has made it back aboveground, to join the living. But if he's alive why is he still seeing ghosts? Jack tries hard to fit in at his new school-and tries even harder to win the affections of his Latin classmate and friend, Cora. In an effort to impress her, Jack leads Cora to the entrance of the underworld and makes a terrible mistake. Soon they have crossed the threshold, and there may be no getting back.Like The Night Tourist, this exciting sequel blends together the modern-day world and mythology-this time cleverly introducing readers to myth of Persephone and Eros. less