There’s been quite a lot published on the topic in the last few years. (A selection cited below, I haven’t ordered or standardised the citations) Will you have a particular focus?
Ransom, H. J., Monk, R. L., & Heim, D. (2022). Grieving the living: The social death of former Jehovah’s Witnesses. Journal of religion and health, 61(3), 2458- 2480.
Ransom, H. J., Monk, R. L., Qureshi, A., & Heim, D. (2021). Life after social death: Leaving the jehovah’s witnesses, identity transition and recovery. Pastoral Psychology, 70(1), 53-69.
Pratezina, J. (2021). "Disciples by default": women's narratives of leaving alternative religious movements (Doctoral dissertation).
Aboud, A. (2020). An exploration of the lived experience of leaving Jehovah's Witnesses (Doctoral dissertation, University of London).
Freestone, N. (2019). Becoming ‘part of the world’: helping former Jehovah’s Witnesses adjust to life outside the religion. (Online essay, published?)
Chryssides, G. D. (2016). ‘The silent majority?’: understanding apostate testimony beyond ‘insider/outsider’binaries in the study of new religions. In Visioning New and Minority Religions (pp. 32-44). Routledge. (Points out that many leavers are not apostates and quiet leavers are understudied)
Ingersoll-Wood, C. S. (2022). The Educational Identity Formation of Jehovah’s Witnesses. Religion & Education, 49(3), 310-338.
Testoni, I., Bingaman, K., Gengarelli, G., Capriati, M., De Vincenzo, C., Toniolo, A., ... & Zamperini, A. (2019). Self-appropriation between social mourning and individuation: A qualitative study on psychosocial transition among Jehovah’s witnesses. Pastoral Psychology, 68(6), 687-703.
Raonsom, H. J. (2021). Leaving the Jehovah’s Witnesses: Identity, Transition and Recovery (Doctoral dissertation, Department of Psychology, Edge Hill University).
Kieler, S. (2020). Managin Familial and Religious Ostacism: Challenges and coping skills for former Jehovah’s Witnesses. Masters thesis
Björkmark, M., Nynäs, P., & Koskinen, C. (2022). “Living Between Two Different Worlds”: Experiences of Leaving a High-Cost Religious Group. Journal of Religion and Health, 61(6), 4721- 4737.
Pratezina, J. (2022). Doubt and Desire: Women’s Narratives of Leaving Alternative Religious Groups. Nova Religio: The Journal of Alternative and Emergent Religions, 25(4), 110-118. (A review of Amber Scorah’s book)
Lalich, J., & McLaren, K. (2010). Inside and outcast: Multifaceted stigma and redemption in the lives of gay and lesbian Jehovah's Witnesses. Journal of Homosexuality, 57(10), 1303-1333.
Hookway, N. S., & Habibis, D. (2015). ‘Losing my religion’: Managing identity in a post-Jehovah’s Witness world. Journal of Sociology, 51(4), 843-856.
LeCount, R. M. (2017). Leaving religion: A qualitative analysis of religious exiting. Inquiries Journal, 9(12).
Pannofino, N., & Cardano, M. (2017). Exes speak out, narratives of apostasy: Jehovah’s witnesses, scientology and Soka Gakkai. (A conference paper?)
Grendele, W. A. (2022). A qualitative exploration of the social dynamics of religious shunning in the Jehovah’s Witness community (Doctoral dissertation, University of West London).
Mundell, G. D. (2016). Exploring Therapeutic Experiences of Gay Male Clients Who Currently Identify, or Who Formerly Identified, as One of Jehovah's Witnesses (Doctoral dissertation, Union Institute and University).