Lucas Corso is a bibliophile mercenary in the middle of two searches. He needs to prove if a manuscript of The Three Musketeers is genuine. He must also find the solution to the enigma of a diabolic book, burned at the printers in 1667 by the Holy office and condemned by the Vatican; only two other copies are known. The stories intermingle and result in a page-turning thriller distinctive of Perez Reverte s writing. The book was taken to the big screen in a movie titled The Ninth Gate by renowned director Roman Polanski. Description in Spanish Descifrar el misterio de un libro que invoca al demonio, del que solo quedan tres ejemplares en el mundo, se convirtio para Lucas Corso, comprador de libros antiguos por encargo, en peligrosa aventura. Pero por si esto fuera poco, un capitulo manuscrito de los tres mosqueteros de Alejandro Dumas entra en escena y se entremezclan historias para dar origen a un apasionante thriller al mejor estilo de Arturo Perez-Reverte.