Metacognitive Bibliotherapy for Anxiety, Depression, and Metacognitions in University Students

The goal of this clinical trial is to learn if a self-help reading program, called metacognitive bibliotherapy, can reduce anxiety and depression in university students studying medicine and health sciences. It will also examine whether the program changes unhelpful thinking patterns about worry and rumination. The main questions it aims to answer are: Does metacognitive bibliotherapy lower anxiety and depression symptoms in university students? Does it reduce unhelpful thinking patterns, such as excessive worry and rumination? Researchers will compare two different self-help books with a waiting list group to see if reading these books helps reduce anxiety and depression. Participants will: * Be randomly assigned to one of three groups: read The Art of Letting Go - How to Stop Rumination, read Anchored: How to Befriend Your Nervous System Using Polyvagal Theory, or join a waiting list * Read the assigned book at their own pace over 8 weeks * Complete online questionnaires at the start of the study, after 4 weeks, and after 8 weeks * Participants in the waiting list group will receive both books for free after the 8-week study period ends

Inclusion Criteria: * Active enrollment in the Faculties of Medicine, Nursing, Pharmacy, Dentistry, or Psychology at Istanbul Nisantasi University * Aged between 18 and 25 years * Provision of voluntary digital informed consent Exclusion Criteria: * Currently receiving active psychiatric treatment (psychotherapy or pharmacotherapy) * Change in psychopharmacological medication within the past 6 months * Prior reading of either of the study books * Presence of acute psychotic symptoms or suicidal risk