There is so much out there to choose from in terms of resources for mental health. Some are useful but some become repetitive, ineffective, or unfounded. This section is a collection of tools I have found useful.
The Change Triangle by Hillary Jacobs: https://www.hilaryjacobshendel.com/itsnotalwaysdepressionbook
The Anxiety and Worry Workbook by Clark and Beck: https://psycnet.apa.org/record/2011-30505-000