Portraiture Unleashed by Travis Gadsby

This is a book to spark your imagination when you're in a bit of a rut. The 60 different ideas for adding a little oomph to your images are divided into sections. Some of these ideas are fairly common but there were definitely some that surprised me or were being used in a different way than what I had seen before. It's a good book for a little bit of inspiration and of course has numerous sample images.
Find it here:
Amherst Media
Amazon
Barnes & Noble