Is it wrong to buy a book containing sensitive military information?

The Pentagon claims that the new book "No Easy Day: The Firsthand Account of the Mission that Killed Bin Laden" reveals some potentially sensitive details about the operation. I'd really like to read about the mission, but I'm concerned that the Pentagon's concerns are valid, and I'd rather not contribute to a work that that puts our soldiers at risk. However, given that the book has already been released, does it matter whether I buy it or not?