Now in print, a new and interesting edited book by Allison Littlejohn and Chris Pegler on open educational resources, (disclaimer: includes a chapter by me and Terry Anderson). Apart from us, Allison and Chris have gathered a great bunch of people together to explore issues from some distinctly learner-oriented perspectives, and across a broad range of contexts, including informal and non-formal learning as well as in formal education.
If you want to get a good flavour of the kind of chapters it contains, and in keeping with the subject matter, a few selected chapters (including ours) have been published openly at http://jime.open.ac.uk/jime/issue/view/2014-ReusingResources-OpenforLearning
Address of the bookmark: http://routledge-ny.com/books/details/9780415838696/