Q. How can I find information about the history of sleep disorder research?

CINAHL Ultimate would be a good database to use to search for the history of sleep disorder research.  Use the CINAHL Ultimate link below and type history in the first search line and "sleep research" using the quotations around sleep research in the second line.  I retrieved several articles on historical aspects of sleep research with this search.  Use the filters on the left to narrow down results to a certain time frame or geographic region.

For books, you can use the OneSearch link below and type in the same search - history AND "sleep research".  We have this eBook that looks like it would be relevant.