If you’re doing anything academic I would highly recommend Annual Reviews (if you don’t already know about it). Annual Reviews is a nonprofit organization with very useful reviews of pretty much every topic you could be interested in – politics, public health, sociology, economics, etc. These reviews are produced by some of the leading researchers in the field and provide great overviews on a topic you may be interested in but may not know where to start (thanks Google search engine). The only downside is that you need a subscription, or a friend with access.
I will linked some ethnicity and health relevant reviews in the next few days.