Researchers from the ILC/Centre for Global Englishes have recently published the following:
Baker, Will, Jenkins, Jennifer, & Baird, Robert. (2014). ELF researchers take issue with ‘English as a lingua franca: an immanent critique’. Applied Linguistics, Advanced Access.
Baird, Robert, Baker, Will, & Kitazawa, Mariko. (2014). The Complexity of English as a Lingua Franca. Journal of English as a Lingua Franca, 3(1), 171-196.
Jenkins, Jennifer. (2014) Global Englishes. Routledge.
This is the 3rd edition (greatly revised) of a book originally called World Englishes. It is used as a university course book, packed full of research, is used by staff and PGRs as well as students at earlier levels, and is the market leader in its field. Details at: http://www.sponpress.com/books/details/9780415638449/Posted By : Lisa Bernasek