Air Libre, originally titled Via Libre (Open Road), centres on Malcomb, a painter living a bohemian existence in a caravan. He has deliberately chosen a life of mobility and freedom, earning his living from his paintings and enjoying informal relationships with his models. His carefree existence changes when Melba enters his life. She helps him sell his work, bringing an unexpected degree of financial success and stability.

As Malcomb’s paintings begin to earn serious money, the couple's relationship becomes more permanent. Marriage, domestic life and eventually a child introduce responsibilities that sit uneasily alongside Malcomb’s fiercely independent temperament. The central tension of the story is therefore not simply sexual but philosophical – can someone who has built his identity around freedom reconcile himself with the routines and compromises of conventional domestic life?

Harrison treats the conflict with a mixture of erotic comedy and social observation. The caravan, once a symbol of independence, becomes increasingly difficult to reconcile with the demands of family life, while Malcomb’s attraction to other women threatens the stability he has helped create. In the latter part of the book another character, Miranda, enters the story and sends it in a new direction.

Via Libre was serialised in Kiss Comix, concluding in No. 105 in 2000; it was subsequently published in French as Air libre by La Cúpula in their La Poudre aux Rêves series.