Of the 7 million books that have been digitized, what does james gleick say about 4 to 5 million of them?

The American author James Gleick affirms that they have been restored to the marketplace.

Once out of print, now available to the user, “bringing them back to commercial life” he says.

Most of those books are protected by copyright and they could only be found on libraries and used booksellers. 

i think it's a)sparta

in 1989, tiananmen square in beijing was the site of china’s main industries. china’s government headquarters. -pro-democracy demonstrations. (second choice)