The book "What a mother of a deaf child should know" is a valuable source of information for parents raising children with hearing impairment. The author, John Dutton Wright, offers a comprehensive approach to understanding the needs of deaf children and providing them with optimal support. The book contains practical advice, success stories and important information about speech development and raising children with hearing impairments. "What a mother of a deaf child should know" can be a reliable guide for parents who are looking for information and support in the difficult process of raising a child with hearing impairment.