"Best of" resources for Service Learning

Perhaps this request has already been sent out to the listserv, but I
will ask again anyhow.  I am compiling a resource library for faculty at
our new Jacobsen Center for Service and Learning at Brigham Young
University.  So far I have some great bibliographies off of websites,
several of the "essential"  books for Service-Learning, and articles. 
However, I would like to know from all of you what the "must-have's" and
"best-of's" are of service-learning.   Most of the bibliographies I have
are so long and we don't want to keep all of the books at our resource
library, but we would like to keep those that are MOST helpful and MOST
used.  Please send me some references and perhaps a short annotated
bibliography, if any of you have them.

Thank you in advance for your reply!  
Enjoy the holidays and have a merry Christmas!

Heidi Bitter
Academic Outreach Coordinator
VISTA Volunteer
Jacobsen Center for Service and Learning
Brigham Young University
2010 WSC
Provo, UT 84604
phone: (801)378-9277
fax: (801)378-1291