For example:
* For a fictional book: You might draw pictures of the main characters, perhaps showing their physical appearance and personality, and label them with their names. You could also draw settings or objects important to the plot and label them appropriately (e.g., "The haunted house," "The magical sword").
* For a non-fiction book: You might draw diagrams explaining a concept, pictures of historical figures, or illustrations of scientific processes. You would then label these drawings to clearly indicate their meaning.
Essentially, it's a visual summary of the book's key elements, using both drawings and text to explain what's depicted. This is often done for comprehension, study, or creative expression.