See below the Spanish Cover art for the blurb directly from Zafon's English website.
"The Prisoner of Heaven, the brand new novel from Carlos Ruiz Zafón, is to be published next summer.
The Prisoner of Heaven returns to the world of The Cemetery of Forgotten Books and the Sempere & Sons bookshop. It begins one year after the close of The Shadow of the Wind when a mysterious stranger enters the shop, looking for a copy of The Count of Monte Cristo.
The Prisoner of Heaven is published in Spain today and the English language version will be out in the UK on 21/06/2012"