"Poor Houses of London" is a unique book written by Octavia Hill, which draws readers' attention to the problem of housing among the poorest residents of London in the 19th century. The author examines housing conditions, the abuse of landlords and the direct consequences of such conditions on people's lives. The book impresses with its detail and frankness, revealing the invisible world of those who lived in the poorest quarters of London. "Poor Houses of London" is an important document about the social problems of the past, which leaves an important mark in the hearts and minds of readers.