Project Muse
A trusted provider of authoritative books and journals from more than 200 of the world’s most distinguished university presses and scholarly societies. It is weighted heavily toward the hunmanities, so it's a good place, after HOLLIS, to search for the author and topic you're interested in, just to see what (else? more?) turns up.
Google Scholar
Familiar and current, it also searches full-text, which makes it different from the other databases (including HOLLIS) on this guide.
Full-text searching can be an advantage when you've got a very narrow topic or are seeking a "nugget" that traditional database searching can't surface easily.
Google Scholar is perfectly acceptable for most general forays into scholarship; its algorithms are excellent and do return relevant results.
NOTE: One simple change can turn Google Scholar into what's effectively a Harvard database -- with links to the full-text of articles that the library can provide. Here's what to do:
- Look to the left of the GS screen and click on the "hamburger" (
). Click on 
. - Look for "Library Links."
- Then type Harvard University into the search box and save your choice. As long as you allow cookies, the settings will keep.