I've read books by Laura Ingalls Wilder and Harper Lee but it's been some time since I've been meaning to look up books by Maya Angelou though I have read about her life and her works.
Harper Lee, is known for her 1960 novel, To Kill A Mockingbird and she awarded the Presidential Medal of Freedom of the United States for her contribution to literature in 2007. She was definitely not racist. In a certain way, she wanted equality which she voices through Scout's character in To Kill A mickingbird when she says that 'there is only one type of folks- folks'. Her story does not defend a slave because slavery was already abolished in the time she set the story. However, prejudices were very strong against the Blacks and many Whites felt undermined and wished to uselessly ascertain their supposed supremacy over Blacks. Through the character of Scout, she revolts against the unjust treatmet of slaves.
Maya Angelou was a feminist activist who with others of the same school of thought as herself tried to reimagine ways of writing about women's lives and identities in a male-dominated society. Beginning with I Know Why the Caged Bird Sings, Angelou uses the metaphor of a bird struggling to escape its cage described in the Paul Laurence Dunbar poem, "Sympathy", as a "central image" throughout all of her autobiographies.[18][86] Like elements within a prison narrative, the caged bird represents Angelou's confinement resulting from racism and oppression.[87] This metaphor also invokes the "supposed contradiction of the bird singing in the midst of its struggle".
Laura Ingalls Wilder is well known for her Little House series. She bases the stories on her own experiences of growing up and moving about relentlessly.Some time after the 1930's, Laura eventually ceased fiction writing and spent the remainder of her life writing about and promoting her philosophies of personal freedom and liberty. She became one of the more influential American libertarians of the middle 20th century. Her books were interestin in the sense that they were alive. The characters were so mapped out out as they could be identified with. The hardships suffered by Laura in the book only make her stronger and bond her still closer to her family.
I would suggest that you try reading as much as possible on the life and achievements of these three authors before you start your project. The more you know the better you will be able to write about them. Wikipedia is a good place to start. Here's the link:
http://en.wikipedia.org/wiki/
Just type in the name of the author at the end to get started.
Hope this helps!