Freud was an influential and controversial psychologist who believed that psychology should study the unconscious mind. describe the two books freud published in the early 1900s. (site 2)

"The Interpretation of Dreams": Freud noticed that dreams played an important role in his analysis of neurotic and "hysterical" patients. When he asked his patients to talk about whatever came into their minds, they often referred to their dreams, which would set off other associations and often illuminate other important connections in their past experience. It took Freud about two years to write the book, finishing it in September 1897. 

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That’s really nice!