The Rougon-Macquart Novels of Emile Zola
http://http://www.well.com/~jax/literature/Rougon-Macquart.html
A comprehensive site devoted to Zola's 20-novel cycle. Includes analysis of the literary qualities of the series as a whole, as well as summaries and brief commentaries for each Rougon-Macquart novel.
The Émile Zola Society
A North American organization dedicated to "the enjoyment and appreciation of Emile Zola and his writing in translation." The Society takes a special interest in new editions of Zola's works and in promoting Zola in higher education curricula.
"Emile Zola" by William Dean Howells
http://www.gutenberg.org/files/728/728-h/728-h.htm
A consideration of Zola's ideas and influence, written by one of the most important American realist novelists of the 19th century.
In Secret (2013)
http://www.movieinsider.com/m9674/therese-raquin/
Full profile of the recent film adaptation of Thérèse Raquin.
The Adultress/Therese Raquin (1953)
http://www.imdb.com/title/tt0046429/
A profile of the successful film adaptation, directed and written for the screen by Marcel Carné.
Mapping Paris: Haussmann and the New Paris
https://www.mtholyoke.edu/courses/rschwart/hist255-s01/mapping-paris/Haussmann.html
An site that provides an efficient overview of Baron Haussmann's urban rebuilding projects. With links to additional information about Second Empire culture and society.
Emile Zola Biography
http://www.biography.com/people/%C3%A9mile-zola-37621
Additional information about Zola's life and writing from Biography.com.