The two-tone fashion we’ve seen recently in clothing extends to book covers. Here are examples of large blocks of colour in graphic design.
First, an example of two-tone design in fashion:
Now let’s take a look at a similar look in book covers.
The book covers below comprise large blocks of colour dividing the canvas into segments.
Below is an example which doesn’t fully work, at least not for me. As a design exercise, perhaps compare this one with the similar (but subtly different!) book covers above.