Here a list of colors I am currently using in watercolor and water soluble colored pencils.
Some book I recommend are:
Transparent Watercolor Wheel –
Jim Kosvanec
The Language of Drawing-
Sherrie Mc Graw
Horses, Dogs, Gnomes-
Rien Poortvliet
Drawing the head and figures, How to draw animals-
Jack Hamm
The art of Animal Drawing-
Ken Hultgren
Figure drawing without a model-
Ron Tiner
Urban Watercolor Sketching: A Guide to Drawing, Painting, and Storytelling in Color
Felix Scheinberger