顧子剛曾任國立北平圖書館館員，他不僅主持經營了大同書店，更是以一己之力創辦了《圖書季刊》英文本，為中外學術界提供了積極、優質的服務。本文通過日記、信劄、回憶錄、新聞報紙、檔案、書刊實體等一手資料，再現他所成就的不朽事業。

Based on enormous firsthand materials as daily, journals, memoirs, newspapers, archives, bibliographies, and books etc., this article tries to clarify two important contributions concerning Mr. T. K. Koo, Union Book Store, and Quarterly Bulletin of Chinese Bibliography. By doing so, the author tells the story of T. K. Koo: How he had contributed to the cultural exchange and communication between China and the West through Union Book Store and Quarterly Bulletin of Chinese Bibliography. In all, this article makes all efforts to explore the history of a faceless librarian of the National Library of Peiping.