Partially true. The morning/evening adhkar can be recited by anyone. However, the section on Ruqyah for severe possession or mental illness ideally requires supervision by a qualified Ustadz . Do not perform exorcism on a stranger alone with just the PDF.
: Deep explorations into the spiritual benefits of reciting the 99 Names of Allah. The "Weapon" Metaphor Kitab Senjata Mukmin.pdf
