The Angel's Game by Carlos Ruiz Zafón game out in May in paperback—looks good.
From the author's website:
In an abandoned mansion at the heart of Barcelona, a young man, David MartÌn, makes his living by writing sensationalist novels under a pseudonym. The survivor of a troubled childhood, he has taken refuge in the world of books, and spends his nights spinning baroque tales about the city's underworld. But perhaps his dark imaginings are not as strange as they seem, for in a locked room deep within the house lie photographs and letters hinting at the mysterious death of the previous owner.
Like a slow poison, the history of the place seeps into his bones as he struggles with an impossible love. Close to despair, David receives a letter from a reclusive French editor, Andreas Corelli, who makes him the offer of a lifetime. He is to write a book unlike anything that has existed - a book with the power to change hearts and minds. In return, he will receive a fortune, perhaps more. But as David begins the work, he realizes that there is a connection between this haunting book and the shadows that surround his home.
Set in the turbulent 1920s, The Angel's Game takes us back to the gothic universe of the Cemetery of the Forgotten Books, the Sempere & Son bookshop, and the winding streets of Barcelona's old quarter, in a masterful tale about the magic of books and the darkest corners of the human soul.