Want to know the history of millennial dating? GenX'er dating? Victorian dating?
Then books are your friend! They are also usually a scholarly source!*)
You can easily search books by typing in your broad keywords in the search box below. You will get all sorts of search results - by using the filters on the left side of the results screen, you can choose the "book" option and take it from there!
*just don't pick a romance novel, or a sketchy self-published book