The Penguin Dictionary of Twentieth-Century Quotations compiles significant and memorable sayings from the 20th century. It aims to provide a comprehensive resource for readers seeking to understand the intellectual and cultural landscape of the era through its most impactful words. The dictionary is organized alphabetically by author, offering a broad spectrum of voices from politics, science, arts, and literature.

As a reference work, The Penguin Dictionary of Twentieth-Century Quotations is expected to serve as a reliable and accessible compilation of significant sayings from the era. Its value lies in its breadth and the clarity of its organization, making it a useful tool for researchers and general readers alike. The collection likely offers insights into the prevailing ideas and cultural shifts of the 20th century through the words of its key personalities. It is positioned as a standard reference for anyone seeking to engage with the quotable moments of that period.