"The Book of the Dead" is Preston and Child's concluding book in their Pendergast Trilogy and their seventh book about the eccentric FBI agent Aloysius Pendergast. They bring to a superbly ludicrous climax Pendergast's struggle with his insane younger brother, Diogenes. Also, all the major players from the earlier volumes are brought on stage and even all the minor ones seem to resurface for cameos.
Preston and Child are marvelous creators of fun, modern pulp writing. Specifically shudderpulp. While there's super science and secret martial arts and impenetrable disguises, there's nothing supernatural despite it always being suspected. Everything's mechanical in the end and it's always goofy fun seeing how they manufacture rationales for the events in the books.
Fun stuff and worth checking out. Note - They may look like big books (and there are 7 of them) but they read super fast.