_The Diary of Gideon Welles_: Welles kept a detailed diary throughout his life, spanning from 1846 to 1879. The diary provides an invaluable account of his experiences in government and offers a firsthand perspective on the Civil War. It has been published in multiple volumes, offering readers insights into the political, military, and social events of the time.
_Lincoln and Seward_: This book delves into the complex relationship between President Abraham Lincoln and his Secretary of State, William H. Seward. Welles provides an insider's view of their interactions, showcasing their differences in philosophy and their collaborative efforts during the Civil War.
_Mr. Lincoln, Man of War: And His Administration's Role in the Civil War_: This work focuses on Abraham Lincoln's role in the Civil War, examining his leadership and decision-making during the conflict. Welles offers his analysis of Lincoln's leadership, revealing the challenges he faced and his significant impact on the Union victory.
_Diary of Gideon Welles: Secretary of the Navy under Lincoln and Johnson_: This compilation of diary entries covers the period from 1862 to 1870 and offers a wealth of information about Welles's tenure as Secretary of the Navy. It provides a comprehensive look into naval affairs, ship construction, and the administration's response to naval challenges during the Civil War.