Professor Wu Chia-hsing of Nanhua University's Graduate Institute of Publishing points out that 25 % of all book sales in Denmark, 33 % in Switzerland, and 20 % in the UK can be attributed to reading clubs.
南華大學出版學研究所副教授吳嘉馨指出，丹麥的讀書俱樂部銷售額就佔總銷售額的百分之二十五，瑞典更高達三分之一，英國則是百分之二十。