Mary Ann Liebert Publishing began in 1981 with its first publication, Genetic Engineering and Biotechnology News. Today, the company continues to focus on the biotechnology field but has expanded its topic base. It publishes peer-review journals, books and publications in a broad range of fields including medicine, nursing, engineering, law, environmental studies and the humanities. Mary Ann Liebert Publishing also has an online database of over 80,000 articles that are either free or subscription-based to read.