Michael Allen's E-Learning Library: Creating Successful E-Learning : A Rapid System For Getting It Right First Time, Every Time by Allen, Michael W. [Pfeiffer, 2006] (Paperback) [Paperback]
Apparently, good instructional design involves communicating with your audience like they are idiots.
It also seems to involve not using appropriate publishing software, but rather (in punk 'zine fashion) xeroxing a printed version with the diagrams separately pasted over.
That said, I learned a bit about one iterative approach to e-learning and while it probably could have been covered in a 15-20 page article and not a 190 page book, it wasn't a total loss.