For the 4th time in U.S. History, the Electoral College selected a President that did not win the popular vote. Previous elections with this outcome include 1876, 1888, and 2000. The IU Libraries have a number of sources to help you make sense of why the Electoral College exists and why (or why not) it is a good idea.
Why the Electoral College is Bad for America by George C. Edwards, 2004
Electoral College and Presidential Elections by Alexandra Kura, 2001
The Choice of the People? Debating the Electoral College by Judith Best, 1996
Wrong Winner: the Coming Debacle in the Electoral College by David W. Abbott, 1991
A website that allows users to adjust the electoral college vote count, 270toWin
You can find a number of great historical news articles about the Electoral College from ProQuest Historical Newspapers.