Campaigning with Grant by Horace Porter

Campaigning with Grant by Horace Porter is considered to be one of the more important primary sources for General Grant's command style.

The book describes Porter's membership in Grant's staff in a closing stages of the Civil War. Specifically when the army of Potomac was attacking Lee and pushing South until the final surrender at Appomattox. Most secondary sources use anecdotes from this book. If you've read any Civil War history you've probably run into some of the material from this book. Not only is the book useful as a source but the writing style is much superior to many Victorian writers. There isn't as much flowery gibberish added on.

Excellent book.