How do the newspaper company's produce newspapers?

Yeah

"Walden" is a book written by Henry David Thoreau and published in 1854. There are no newspaper companies called "Walden", although there is a bookstore chain called Waldenbooks.

there are many such as: the metro, daily mirror, daily mail, recorder,express, the independent and many more

this is so because it is news on a paper, therefore creating the newspaper.

i say about 275