This is old, but excellent. Even after reading much of the newer research on the JST, I found this quite valuable. Anyone interested in the JST should read this, or at least have it around for reference.
I picked this up because Mark 11:22-25 doesn't get a lot of theological consideration because people are too busy considering its redaction history. And that's a shame, because it covers such important ground, especially when put into dialogue with Mark 14:36. So this was a good read.
This is a good presentation of the historical critical approach to the Bible for someone unfamiliar with the topic. The conclusions he draws are definitely on the more liberal end of the spectrum, but the basic information represents the mainstream consensus.