Welcome lurkers and newbies! If you want to read more about the early years of the Watchtower, newspaper archives are a great place to start. The Brooklyn Daily Eagle covered the ever growing Russelites/International Bible Students/Watchtower movement as it continued to grow in Brooklyn in the early years.
You can view the clippings I have found here: https://bklyn.newspapers.com/profile/Wild_Thing/clippings/1 or search on your own.
Here is one interesting article from 1909. It is about when Russel first moved the Watchtower Headquarters from the Pittsburgh area to Brooklyn. https://bklyn.newspapers.com/clip/15945460/divorced_pastor_here_opens_new/