Question

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

Answer 1

They had been out of print but now restored to the marketpalce -apex

Answer 2

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.