The Churchill Companion offers twenty-eight categories of ready-reference information on the life and times of Sir Winston S. Churchill (1874-1965) for students, scholars and researchers, together with internet references for further reference. It will be available digitally as well as in print form. The Companion begins with a 100-year Timeline of Churchill's life from his birth in 1874 to the death of his wife Clementine in 1974. Subsequent chapters list Churchill's books; recommended books about him; his BBC broadcasts from 1938 to 1945; pound-dollar values and inflation since 1874; dramatic productions in film and television; elections fought by Churchill; the family tree; leading articles in the journal Finest Hour; the 1965 funeral service; a glossary of Parliamentary and political terms; British governments, sovereigns and prime ministers; Churchill's honors, orders, decorations and medals; his favorite hotels; his military commissions; a military glossary, leading Churchill myths; government offices held; British political parties; Churchill residences and holiday accommodations; Parliamentary, personal and private secretaries; the British nobility; World War II summit conferences; all Churchill's race horses; his travel by sea; his travels in North America, his travels in World War II, and the Visitors Book at Chartwell. The Churchill Centre is the leading international membership organization devoted to preserving the thoughts, words and deeds of Sir Winston Churchill among democratic and freedom-loving peoples throughout the world. The Centre has over forty branches, chapters and affiliates in the United States, United Kingdom, Australia, Canada, Israel and Portugal. Centre publications include the quarterly journal Finest Hour (in both print and digital form), featuring the best contemporary writing about Churchill's life and times, includingby special permission Sir Winston's own articles and speeches from among his fifteen million published words.

Many of the chapters in The Churchill Companion are derived from articles and research in Finest Hour. Until now, accurate summaries like these were obtainable only in lengthy searches of the Internet, and many sources are not authoritative. Twenty-five experts in Churchill studies have contributed these chapters, exhaustively researching each entry for accuracy.