On Jazz investigates the vibrant energy and intimate moments of jazz music through a visual lens. Guy Le Querrec captures musicians and audiences in spontaneous and dynamic settings, emphasizing the interplay between sound and movement.

The photographs explore themes of rhythm, expression, and communal experience, revealing both the public performances and private interactions that define jazz culture. The 152-page book, published by creaphis editions in 2007, presents a nuanced study without reliance on color or elaborate staging.