Draw a simple rectangle for the book cover
Add a second slightly offset rectangle for thickness
Draw a straight line near the edge for the spine
Add a curved line on the front cover if the book is open
Draw a smaller rectangle inside for the pages
Add a few horizontal lines to show page edges
Sketch a bookmark ribbon if desired
Add simple details like a title box or label
Outline the final shape with a darker line
Erase extra sketch lines
Color the cover and pages with basic colors