SPOILER ALERT!!!!
Read no further if you don't want a hint for Challenge 1!
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Go to our library database Dissertations and Theses Global (ProQuest).
When you're in the database, type this into the upper search box:
Martin Luther King
And to the right of that search box, use the pulldown menu to choose "Author - AUTHOR."
Then click Search.
Dr. Martin Luther King, Jr.'s, 1955 doctoral dissertation will come right up!