Hey @Josh Oaten this is an area of interest to me too.
I didn't read David's book yet but its on the to do list. Please do keep us posted what you find.
There are many free reports you can subscribe to like :
Marcus & Millichap, https://www.yardimatrix.com , CBRE etc.
The trouble in CRE is access to quality data. Costar is by far the best source for US data, but it requires an expensive monthly membership. In the past, I've explored "up and coming" markets by pulling US census data and mapping areas with large population growth.
Josh: Are you looking for data on US emerging markets or non-US emerging markets?
Well, I think that I cover it in this article in a bit of detail: https://www.biggerpockets.com/blogs/10145/66160-ho...
There are not a lot of markets left right now that haven't had a large price run up. The biggest trap to look for is a market that is seeing little to no growth, yet price appreciation.