Here are a few books I highly recommend, by category:
Marriage/Family
Love, Sex and Happily Ever After by Craig Groeschel
When Sinners Say I Do by Dave Harvey
Playing Hurt by Brian Goins
Sacred Marriage by Gary Thomas
Discipleship/Christian Growth/Gospel-Centered Living
Radical by David Platt
Radical Together by David Platt
Desiring God by John Piper
The World-Tilting Gospel by Dan Phillips
From the Garden to the City by John Dyer
Growing Up by Robby Gallaty
Biblical Issues
Health, Wealth and Happiness by David Jones and Russell
Leadership
Advanced Strategic Planning by Aubrey Malphurs
Look Before You Lead by Aubrey Malphurs
Change the Culture, Change the Game by Roger Connors and Tom Smith