Working Through Self Harm: A Workbook
The following link leads to an extensive workbook published by Harmless, a national user led self harm organization that provides support, information and consultancy about self harm to individuals who self harm, their friends, families and professionals.
Workbook Link: https://harmless.org.uk/wp-content/uploads/2020/10/Harmless-Workbook-Working-Through-Self-Harm.pdf
Harmless' Website: http://www.harmless.org.uk/