1. Into the Crater: The Mine Attack at Petersburg by Earl J. Hess (Univ of S. Carolina Pr, 2010).
My interest in the subject cratered long ago, but I'll read anything by Hess and the research and writing here look top notch as expected. Similar in design to those from his eastern theater fortifications trilogy, maps are plentiful and informative.
2. Lee and Jackson's Bloody Twelfth: The Letters of Irby Goodwin Scott, First Lieutenant, Company G, Putnam Light Infantry, Twelfth Georgia Volunteer Infantry edited by Johnnie Perry Pearson (Univ of Tenn Pr, 2010).
The latest volume from UT Press's Voices of the Civil War series, the Scott letters span nearly the entire war, from June '61 through February '65. Maps, photos, and a unit roster supplement the text.