I ran across a book I think might be of interest to many here:
"Educating, Evaluating and Selecting Living Kidney Donors", edited by Robert W. Steiner.
It is essentially a collection of eight papers that have to do with medical and ethical selection of donors - especially written for donor counselors but not terribly hard to read and has a great deal of interesting information for donors. I got through it and I am far less informed than many of the others on the forum in terms of medical details.
It is not new, it came out in 2004, but I think a lot of it is quite relevant.
You can actually order it on Amazon but it has a price of $179!!! That's more than a dollar a page! I work in a university and found it in the library, so anyone who has access to an academic library may be in luck.
Enjoy,
Mooge