This book chronicles the formative years of Abraham Lincoln, tracing his journey from humble beginnings to the cusp of his public life. Sandburg, a renowned Lincoln biographer, draws upon extensive historical research to present a detailed account of Lincoln's childhood and adolescence in the American frontier. The narrative focuses on the experiences, influences, and character development that shaped the future president.

Carl Sandburg's "Abe Lincoln Grows Up" is widely regarded as a seminal work in Lincoln historiography, particularly for its focus on his early life. The book is praised for its rich, evocative prose and its deep immersion in the historical context of the American frontier. It serves as an accessible yet thorough introduction to Lincoln's formative years, offering insights into the development of his character and intellect for a broad readership.