"In and out of Wettest England" is a book written by the famous social reformer and founder of the Salvation Army, William Booth. In his book, the author describes the terrible living conditions of the homeless, fever, refusal and poverty in London at the end of the 19th century. Booth offers his plans and ideas for social improvement, rescuing the homeless and destitute. This book became a prophetic address to society and caused a strong reaction from the readers of that time. "In and out of the wettest England" remains relevant today, raising issues of poverty and homelessness that need to be addressed today.