The Bibliography of Winston Churchill includes the major scholarly and nonfiction books and scholarly articles on the career of Winston Churchill, as well as other online sources of information.
The Churchill family controls many of the documents and has authorized an 8-volume official biography. It was started by his son Randolph Churchill (1911–1968) and finished after his death by Martin Gilbert (1936–2015), a scholar at Oxford. It included "Companion volumes" filled with original sources. The total is 28 volumes with over 30,000 pages and many illustrations. The detail is so thorough and minute that the broader context is obscure and hard to follow.
These books contain a very large collection of primary sources, especially memoranda written by Churchill, letters to him and from him, and notes of meetings he attended. Very few of the Companion books are online.
See also the biographies above, especially Jackson (2011), Jenkins (2001), Pelling (1974) and Roberts (2018).
See also the 23 Companion volumes listed above.