‘Percy Jackson’ sequel picks up where the demigod left off

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PERCY JACKSON: Sea of Monsters

The mythology-rooted “Percy Jackson & the Olympians” franchise is fairly engaging stuff, unabashed “Harry Potter” knockoff or no. Author Rick Riordan’s popular kid-lit series made its screen debut three years ago with an adaptation of “The Lightning Thief” — directed by “Potter” alum Chris Columbus, naturally — and proved to be a fun, brisk, even intermittently educational fantasy spectacle. As the lead, Logan Lerman (“The Perks of Being a Wallflower”) skated through the action with easy charisma. If the movie had had a convincing emotional core, the imitation discussion might have been footnote material.

The new sequel, “Percy Jackson: Sea of Monsters,” delivers more of the same, on all counts.

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