2012 Handbook of Health Economics (Pauly, McGuire and Barros) is free on-line. Here is the link to the pdf files.

Excellent literature reviews and new insights. I purchased the hard cover version, but this is wonderfully accessible.

http://www.sciencedirect.com/science/handbooks/15740064

Many research universities, including BU have access to ScienceDirect.

It is unusual for Elsevier to post its new material for free access in this way.

Enjoy.