At this late stage, it wasn't too bad of a project. About 100 pages, when it was all done. The author had it in miserable shape in March, back when I first took it on. Three re-writes by the author were required before the school would agree to publish it so he/she could graduate. On the plus side, that meant I got paid to edit each draft. Tedious, but profitable. The true upside was being part of something interesting, even if I wasn't the originating author.
If anyone out there has good writing/grammar skills, you might consider this kind of work in the future.