Although these two books are not specifically about nun abuse, they do add insight into the issue. Click titles to buy on Amazon.
Sex in the Forbidden Zone: When Men in Power-Therapists, Doctors, Clergy, Teachers and Others-Betray Women's Trust by Peter Rutter, M.D. Excellent insights into the sexual abuse of power. St. Martin's Press, 1989
Whistle: Tom Doyle's Steadfast Witness for Victims of Clerical Sexual Abuse by Robert Blair Kaiser First-hand experience with the Church's coverup of abuse. Caritas Communications, 2015
In Sweden, Ebba Larsson is a journalist with EXPRESSEN. Here's the link: