Adrian / Immanence blog has put up some helpful links pointing to recent series' publications in ecocritical theory, HERE. Interesting as well to note he points out the vigor of Lexington Books' Ecocritical Theory and Practice series.
Lexington Books were a pleasure to work with. I've published two books with them (A Philosophy of Sacred Nature - pictured above - and Charles Sanders Peirce and a Religious Metaphysics of Nature) and the folks at Lexington have been nothing but absolutely outstanding.
They are a solid press and are expanding. Check them out if you can.