Colored Pencil Explorations
I have to admit that I'm a fan of Janie Gildow's work, so it's not surprising that this book and her other show up on my recommended list. Janie covers a variety of mixed media techniques, from dissolving pigment to painting colored pencil over airbrushed art, and even drawing on 3d or textured surfaces (the polymer clay sculture with the mat is wild). Even if you don't work in mixed media, I still highly recommend this book as it presents possibilities you may not have considered.