"National Treasure 2: Book of Secrets" (PG-13) Nicolas Cage reprises his role as a historian and treasure hunter by taking the president hostage in his quest to clear an ancestor in the assassination of Abraham Lincoln. And of course, along the way, he stumbles on another hidden trove of vast riches, accompanied by his mom and dad (Helen Mirren and Jon Voight), his estranged girlfriend (Diane Kruger) and an adversary (Ed Harris) with a dark family history. A two-disc DVD set (Disney, $30) and the Blu-ray release ($35) pile on the extras, including deleted scenes and commentary by director Jon Turteltaub and Voight. Behind-the-scenes segments feature cast and crew including producer Jerry Bruckheimer on visual effects, stunts and the history behind artifacts and legends in the story. The Blu-ray release has two extra deleted scenes plus a quiz. Also debuting on Blu-ray is the first "National Treasure" ($35) with commentary by Turteltaub and a new featurette.

"George A. Romero's Diary of the Dead" (R) King of the zombies Romero goes back to his indie-film roots with a "Blair Witch Project" documentary style to his fifth movie about reanimated corpses with a hankering for live human flesh. This chapter follows a group of film students whose low-budget horror flick turns into an impromptu documentary as their camera chronicles the rise of zombies that feed on the living. The DVD (Genius, $25) has a feature-length making-of documentary and behind-the-scenes segments, plus commentary by Romero and others. Also out is a 40th-anniversary edition of Romero's "Night of the Living Dead," the low-budget horror classic that turned zombie tales into a subgenre.

DAVID GERMAIN, ASSOCIATED PRESS