When looking for references, textures, backgrounds or just inspiration online, image databases are the way to go. But many sites place restrictive licenses on their images. The most liberal and undoubtly best license is CC0 which allows you to do what you want with the images. We compiled a list of great resources for CC0 images.
Review of the book "Learning Blender – A Hands-On Guide to Creating 3D Animated Characters" by Oliver Villar. The book is targeted at beginners, intermediate users who want to learn about character creation and those who want to make the switch to Blender from another package.