Since I don't know the specific 'gravel to tempo graphic novel', I can only guess. Maybe it's about a character's transformation from a rough, gravel - like state of being to a more harmonious and rhythmic state, like the concept of tempo in music. It could be a metaphorical journey of self - discovery or growth.
I'm not sure as there's not much information on this 'gravel to tempo graphic novel'. But it could potentially be about a world where the physical environment of gravel plays a role. The 'tempo' part might refer to the pace of life or events in that world. It could be a post - apocalyptic story where the main character has to navigate through a gravel - filled wasteland and adapt to a new tempo of survival. Or it could be a more abstract story about emotions, with gravel representing a harsh emotional state and tempo being the journey towards a more balanced emotional rhythm.