Live paint, Live color and patterns

Painting with patterns is covered at the end of Chapter 6 in your book (p. 201-205).

You can come up with any type of tile-artwork (something interesting to repeat), with it selected go to menu OBJECT>Pattern>Make
It will take you to the Pattern Dialog box.

Video: Make a pattern, CC 2020

Video: Pattern to be applied to a stroke

Video: Transforming patterns

Video Tutorial: Patterns in th context of Illustration
Video: Pattern in the context of graphic design
Video Tutorial:

Using Pattern brushes is covered in Chapter 11 of your book, (p.334-339).

Video Tutorial: How to create a pattern to be appplied as a brush stroke.

The Live Paint tool is covered at the end of Chapter 6, pages 206 to 208.

It is a different way of working in Illustrator customized towards people that have a background in Drawing & Sketching: it allows you to colorize "open shapes" and groups of lines, that other wise will be impossible to colorize.
You can enter Live-Paint mode by first selecting the complete artwork, then choosing: OBJECT<Live paint< Make.

You can also access it by pressing the icon in the tool bar.

Remember that the Live-paint bucket tool is located inside the Shape-builder icon in your Tools palette. It works in direct connection with the Swatches, so have the colors you want to use previously organized in a swatch group (swatch palette p.188-193).

Video Tutorial: Using Live-Paint, Youtube video

Video Tutorial:Live paint in Illustrator CC, with Angie Taylor.

To leave the Paint-Live mode you should come back to the main menu and chose: OBJECT<Live Paint< Release.

To modify a stroke with Live-paint you need to hold Shift when using the bucket tool >OR double-click on the tool icon to show the Options window for the tool, change the preferences there to show the stroke-tool for the Live-paint tool also (de-activated by default, Right: Paint strokes).

To define the size of gaps that Illustrator will allow in order to establish a Fill you can open the Gap Options Dialog box,
OBJECT>Live Paint<Gap Options
In the preview you will see what gaps is overcoming with a tiny bar, in the color you define.

Video: Automatic Gap-detection, HERE

If you watched Angie Taylor's video, you should know by now that when you enter Live-Paint mode you will loose previously applied Appearance-settings, Like Brushes, live-effects... Frecuently you will have a drawing made of brush-artwork (with changes of width in the strokes): in that case, before you enter Live Paint mode, you should Outline your strokes with OBJECT<Path<Outline stroke.