What are the most useful books or papers on research methodology specifically for using technology in second language learning?

Hello Otto Condliffe,

I hope this book can help you

ESL Games and Classroom Activities: An Interactive ESL Activity Book for All Ages

The following articles may help you too

Rankin, Y., Gold, R. and Gooch, B., 2006. Evaluating interactive gaming as a language learning tool. In Proceedings for ACM SIGGRAPH Conference.
Cornillie, F., Jacques, I., De Wannemacker, S., Paulussen, H. and Desmet, P., 2011. Vocabulary treatment in adventure and role-playing games: A playground for adaptation and adaptivity. In Interdisciplinary Approaches to Adaptive Learning. A Look at the Neighbours (pp. 131-146). Springer, Berlin, Heidelberg.
Anyaegbu, R., Ting, W. and Li, Y.I., 2012. Serious game motivation in an EFL classroom in Chinese primary school. Turkish Online Journal of Educational Technology-TOJET, 11(1), pp.154-164.
Dolati, R.I. and Mikaili, P., 2011. Effects of instructional games on facilitating of students' vocabulary learning. Australian Journal of Basic and Applied Sciences, 5(11), pp.1218-1224.
Yudintseva, A., 2015. Game-enhanced second language vocabulary acquisition strategies: a systematic review. Open Journal of Social Sciences, 3(10), p.101.
Lee, Y.Y., Cheon, J. and Key, S., 2008, March. Learners’ perceptions of video games for second/foreign language learning. In Society for Information Technology & Teacher Education International Conference (pp. 1733-1738). Association for the Advancement of Computing in Education (AACE).

All the best