1. The Chickamauga Campaign - A Mad Irregular Battle: From the Crossing of the Tennessee River Through the Second Day, August 22 - September 19, 1863 by David A. Powell (Savas Beatie, 2014).
Throw away your other Chickamauga books.
2. Unionists in Virginia: Politics, Secession and Their Plan to Prevent Civil War by Lawrence M. Denton (The Hist Pr, 2014).
This book traces the unsuccessful efforts of Virginia Unionists (among them George Summers, John Brown Baldwin, John Janney and Jubal Early) to strike a political solution to the secession crisis and avert Civil War.