If you're interested in Cezanne, than Susan Sidlauskas's sometimes rather dense Cezanne’s Other: The Portraits of Hortense (2009) might be for you. In a detailed analysis of Cezanne's portraits of his wife she seeks to rescue Hortense from the derision of art historians, but overall this is also really good art history. In the end she offers a compelling account of Cezanne's practice through an analysis of this sub-group of work.
