This was originally published in 1955, so it is somewhat dated. However, this is nonetheless a very nice biography of Pierre Gustave Toutant Beauregard, one of the small handful of "Full Generals" in the Confederate Army during the Civil War.
He was a complex, perplexing, and talented person. His pride led him to end up wasting a lot of time (and burning bridges) that accomplished little. For instance, his feud with President Jefferson Davis. He grew up admiring Napoleon (he was Creole, and spoke French for the first part of his life), and often developed battle plans during the Civil War that were Napoleonic in scope--and probably utterly impractical.
The biography does a nice job of laying out his early life and beginning to identify some of the personality traits that would be significant later on. His army career is well detailed, from West Point, to his engineering duties, to his important role in the Mexican War (he was one of a group of young officers, including Robert E. Lee, who were General Winfield Scott's eyes and ears).
Then, his role in the Civil War. The book does a nice job of chronicling some of his major successes--his leadership of the defense of Charleston, his key role in preventing Benjamin Butler and, later, Ulysses Grant from easily taking Petersburg. But there is also his ambiguous legacy from First Manassas (he was the operational commander and deserves credit, but his poorly configured orders, his wild-eyes strategic ideas, etc. raise one's eye brows), to Shiloh (an impractical attack plan), etc.
Thus, there were some great successes (Petersburg and Charleston), some ambiguous successes (First Manassas), a losing battle (Shiloh), and lots of political warfare with his government and other military officials.
His lot after the Civil War? He did well! The book does a nice job of describing his later career.
All in all, despite its age, this is a fair biography of a complex person. It is pretty critical of him at some points, but gives credit where it is obviously due. If interested in this fascinating figure, this is not a bad starting point. . . .