>>1336257>>1336039>"Color and Light: A Guide for the Realist Painter" by James GurneyNow, when you have solid understanding of lines and shapes this book will open you new page of development your skills. You will know how to combine colors, from what parts it consists, its physiscs and many more usefull artistic facts.
>"Framed Ink: Drawing and Composition for Visual Storytellers" by Marcos Mateu-MestreComposition is kinda important for any drawing, but especially for drawing comics or storyboarding.
>"The Skillful Huntsman: Visual Development of a Grimm Tale at Art Center College of Design"Very interesting book about conceptual design from characters to landscapes.