The Triple Alliance: Trials and Triumphs is a book written by Harold Avery that explores the history of the Triple Alliance, an agreement between Germany, Austria-Hungary, and Italy in the run-up to World War I. The author talks about the political and strategic aspects of this agreement, the reaction of other countries to its formation and consequences in international relations. The book is a valuable source for understanding the political dynamics of Europe at the beginning of the 20th century and the important events that preceded the First World War.