Just finished looking through A Funder's Guide to Evaluation, by Peter York. Good tool for funders, but also for nonprofit managers, as it looks like a pretty reasonable set of expectations. Perhaps even something to GIVE to your funders!
Second book I haven't seen but have heard about, Forming Alliances, Working Together to Achieve Mutual Goals, by Emil Angelica and Linda Hoskins. I've heard both the authors and their prior works, particularly Emil's Coping with Cutbacks, are really good.
Check them out.