1. General Edwin Vose Sumner, USA: A Civil War Biography by Thomas K. Tate (McFarland, 2013).
This military biography of Sumner covers his entire professional career, not necessarily privileging the Civil War years. From the looks of the bibliography, it's among the more deeply researched biographies from this publisher.
2. Thirteen Months at Manassas / Bull Run: The Two Battles and the Confederate and Union Occupations by Don Johnson (McFarland, 2013).
In addition to summarizing the two battles, the book offers quite a bit of information about the hamlets, farms, and families living in the areas encompassing the fighting.