From Mary Katherine's link:

"In the past few years, Bruce has endured some serious health problems, and so his friends Debbie Green and George Madaraz decided it was high time for Bruce to take the spotlight. And so with Bruce, they have released "Tambourine Man," "to preserve and present this unique and joyous music composed by a guy with definite legendary status. The compositions represent the third stage of his creative career and have been only heard by a small circle of friends."