A feminist criticism essay is usually a careful analysis of the feminist issues, represented in the book, which are basically concerned with the images of the female characters and their role in the narration. There are a number of standard aspects you can focus on, while exploring the view of the author on women, expressed in his work.
First of all, prepare sketches of the female characters. For this you need to single out all the information the narrator gives us about them – their background, childhood, sexuality, work and outlook on the world. The better you get to know the character, the easier it will be to draw conclusions about them.
The second step would be to compare and contrast these female heroines to their male counterparts. Their opposition is of vital importance for feminist criticism. While contrasting them, it is recommended to take into account the historical period of time, depicted in the book, and decide whether the relationship, shown between the male and female characters, was typical for that time or not, and, probably, indicate the reasons for this.
What is more, it can help you to learn the views of the writer on the ideal situation with women, as it can give you a key to understanding the female characters. It is also advisable to analyse the conversations between men and women, their attitude to each other and their overall role in the book. Make sure you examine the views that men and women in the book express concerning females.
All in all, the more detailed and argumentative your essay is, the better impression it will produce on the readers. Therefore, examine various aspects and questions, since it will help you to get a complete picture of the piece.
Feminism has gotten to be a very broad subject in recent years. It used to be that "feminism" was understood to focus on women's right to vote and to own their own property. But feminism has now become so involved with so many different human affairs that it would seem like an impossible task to discuss the movement in a single article or even a book. Therefore, I would suggest that you could find a thesis statement more easily if you would limit your intended discussion to a single aspect of feminism.
Wikipedia contains a lot of interesting information about Feminism (see reference link below). An aspect of the subject that seems fairly fresh is "post feminism." According to Wikipedia:
The term post-feminism is used to describe a range of viewpoints reacting to feminism since the 1980s. While not being "anti-feminist", post-feminists believe that women have achieved second wave goals while being critical of third wave feminist goals.
I suggest that you do a little reading up on the subject before trying to formulate a thesis statement. You ought to be able to find material for several good thesis statements in the Wikipedia article. Of course, your statement should be based on what you personally believe. But I feel sure you would find it easier to take a stand on a single aspect of feminism than on the centuries-old, endlessly debated subject as a whole.