Here is a free coloring page promoting my kickstarter book:
A-holes was inspired by the amusing double entendre of the phrase "A-holes"—the technical term for the negative space in a letter A (this space is actually called the "counter"). Letters' negative space might seem irrelevant, but it determines a lot about the character of a font. As the book shows, the shape of a hole can tell you if a font is a serif or sans serif, and it can tell you where elements like the stroke, crossbar or bowl are located. Holes are like a traceable pattern, giving you clues about a typeface without seeing it.