A number of action research and participatory action research handbooks have been written over the past 25 years. An ARNA-initiated project resulted in publication of The Palgrave International Handbook of Action Research, published in 2017 and co-edited by Lonnie Rowell, Catherine Bruce, Joseph Shosh, & Margaret Riel: https://inthandbookactionresearch.wordpress.com/
2019 saw the publication of The Wiley Handbook of Action Research in Education edited by Craig A. Mertler.
International Handbook of Action Research edited by Lonnie Rowell, Catherine Bruce, Joseph Shosh, & Margaret Riel: https://inthandbookactionresearch.wordpress.com/
Susan E. Noffke and Bridget Somekh edited the classic 2009 SAGE Handbook of Educational Action Research.
Other literature is found in journals, including:
Canadian Journal of Action Research: http://journals.nipissingu.ca/index.php/cjar
Educational Action Research: http://www.tandfonline.com/toc/reac20/current
Action Research: https://journals.sagepub.com/home/arja
Themed issue of Educational Research for Social Change: ERSC Ed 13a – Call for 13a Edition (11-04-17)
Special issue of International Journal of Qualitative Studies in Education, Volume 30, Issue 5, June 2017, Can Participatory Action Research (PAR) Democratize Research, Knowledge and Schooling?: Experiences from the Global South and North.
See also the Reference List for sources cited on this website.