Books on Bikes is a community outreach and literacy program, created by Charlottesville City School librarians and teachers, that gives books to children in Charlottesville, VA in the summer when schools are out. They came up me to help create book carries for their cargo bikes to allow them both to carry books and to make it easy for the kids to look thru all the books and select their favorite.
The carriers not only had to function well but also had to be light weight so as not add to the burden of pedaling a bike loaded with books. Ultimately we settled on a minimal wooden frame that is skinned with twin wall poly carbonate. Giving the racks a clean modern look.