Although the book under review does not speak of music notation or scales, I’d like for you to consider a C major scale on the piano: C, D, E, F, G, A, B, C- all white notes. Now start over. Skip the D and E, but add the black note between them, an E flat. Add the black note between F and G. Skip A and B, adding the black note between them. Now the scale looks like this: C, E flat, F, G flat, G, B flat, C.