Start with Gale Literature for introductory information on authors and literary texts.
Note that none of these are scholarly. You can return to find scholarly literary criticism later.
The image below shows a search for information about "Two Kinds" by the author Amy Tan.
Type in author, title, and/or keyword. Note that it may work better to type the author's surname, then first name.
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Select Topic and Work Overviews, Biographies, Interviews, and other introductory works. In this case, I selected Topic & Work Overviews.
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This excerpt discusses Tan's use of memoir and memory to shift perspectives and draw the reader into the competing world views of mother and daughter.
Understanding the history of the era in which an author, artist, or thinker lived or in which a piece of text was created will often give you better insight into that work's meaning, symbolism, and themes.
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The reference series American History through Literature offers particularly insightful background articles that contextualize literature, history, ideas, and authors.