Both parents were factory workers with limited education when they met and married, and there were no books or magazines in the series of apartments where they raised their children. Zinn's parents introduced him to literature by sending 10 cents plus a coupon to the "New York Post" for each of the 20 volumes of Charles Dickens' collected works. As a young man, Zinn made the acquaintance of several young Communists from his Brooklyn neighborhood. They invited him to a political rally being held in Times Square. Despite it being a peaceful rally, mounted police charged the marchers. Zinn was hit and knocked unconscious. This would have a profound effect on his political and social outlook.