If you have pocket money, I recommend that you buy a Macmillan book and tell them that you support free press. You can preorder Fire and Fury or pick something else. Just go encourage these folks for standing up to the big orange bully. I should probably buy a copy myself -- I'm not keen on reading something that depressing, but I do like to buy banned books.
EDIT 1/10/18 -- The letter of persistence has now been posted.