作者Josh Ryan-Collins是UCL的副教授，不应该写有显著问题的书。事实上这一段话几乎是英格兰银行官网网页链接{Questions about banknote production | Bank of England}下面这段话的翻译：
The Bank does not make a profit on the production of banknotes. Members of the Note Circulation Scheme buy new banknotes from us at face value. We invest this money in assets such as government bonds. We deduct the cost of printing and issuing banknotes from the income on these assets, and return the balance to HM Treasury. Information relating to this can be found on page 37 of the Bank’s latest Annual Report and Accounts to end-February 2020. This income is called seigniorage.