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With the long-awaited sequel Spinal Tap II: The End Continues now in theaters, director Rob Reiner joins with co-creators Christopher Guest, Michael McKean and Harry Shearer to take fans on a behind-the-scenes look at the fake history of fictional rock band Spinal Tap in a new book.

On sale for $21.74 (regularly $29) on Amazon, A Fine Line Between Stupid and Clever: The Story of Spinal Tap also takes a look at the making of the original 1984 mockumentary This Is Spinal Tap and how it went from a cult classic to entry into the National Film Registry.

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