These are the books that I have referenced more in the first 1o months of this year than any other.  (I have linked the titles to Amazon)

Top 10

Living in Color by Randy Woodley (Culture – Church)
Making Room for Leadership by Mary Kate Morse (Leadership)
Cross & Covenant by Larry Shelton (Theology)

The Next Evangelicalism by Soong-Chan Rah (Church)
The Great Emergence by Phyllis TIckle (Church – History)
A New Kind of Christianity by Brian McLaren (Theology)

Whose is Afraid of Post-Modernism by John Caputo (Theology)
Beyond Liberalism and Fundamentalism by Nancey Murphy (History)
The Tipping Point by Malcolm Gladwell (Culture)

The Starfish and Spider (Culture)

Honorable Mentions:
The Emergent Manifesto of Hope (Church)
Collapse by Jared Diamond (History)