Are there Christmas boutiques in your area? It costs something to display your wares, but I fabric books might sell well around Christmas. I would imagine there are lots of grandmothers out shopping for little ones then....
Our high school hosts an annual crafts fair in the spring. You do have to buy table space, but I think the cost is reasonable. For that, though, you would probably need more variety to create an attractive display. In the boutiques, your books would be surrounded by other items for sale so display wouldn't be a problem.