another greeat book to get would be The artist's handbook by ralph mayer. reviews everything one could want to know. also a color wheel is another great thing you could get her.

link to the book: https://www.amazon.com/Artists-Handbook-Materials-Techniques-Reference/dp/0670837016

link to color wheel: https://www.amazon.com/dp/B002J4OPEM/ref=asc_df_B002J4OPEM5271826/?tag=hyprod-20&creative=395033&creativeASIN=B002J4OPEM&linkCode=df0&hvadid=167148482147&hvpos=1o4&hvnetw=g&hvrand=8189816881818029176&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9009892&hvtargid=pla-310385990598