Josef Woodman has put together a very informative and well researched work on medical travel. Patients Beyond Borders is a must-read for anybody considering medical travel.
Josef Woodman has also released a version of Patients Beyond Borders specifically for Singapore.
Beauty from Afar: A Medical Tourist's Guide to Affordable and Quality Cosmetic Care Outside the U.S. is a balanced, informative book that seems to be the de facto authoritative guide to getting plastic surgery overseas. Jeff Shult is an extremely knowledgeable and recognized figure in the medical tourism field.