A good introduction to Orthodox Christianity from an enlighhtened Protestant position. Clendenin is neither too critical nor overly accepting in his overview. His viewpoint seems to be middle-of-the-road among protestants - neither Liberal or Conservative. I assume Clendenin himself is a Presbyterian from his comments in the prologue, but he doesn't spend alot of time talking about denominations.
Clendenin has spent many years in Russia as a visiting professor, so he has has exposure both to the West and to Orthodoxy on its home turf.