Unfortunately, since the death of John Balston, there is no-one associated with the site who can answer questions about paper.
If you do have a query, you might find help through one of the sites listed on the Links page. In particular you might try the questions page on www.paperhistory.org where questions can be asked by visitors to the site of the International Association of Paper Historians.
For details of how to purchase any of the books, please contact:
This site is hosted by Simon Blackwood Fine Arts and supported by John Brass, Gilder.