Jonathan co-authored Mary Jane in 1978 with Zolton Soldgroff, Mary Jane is a musical revue that celebrates marijuana. Mary Jane showed in the Park Royal Theatre in New York. Twenty five humorous songs were performed with the audience often singing along. Costumes were designed by Jonathan’s wife Helena Stuart. The couple later opened a successful retail/ wholesale clothing business Only Hearts.

New Prohibition is the modern manifestation of Mary Jane. A percentage of profits from the sale of New Prohibition is donated to paper writing organizations dedicated to changing current drug laws.