The literature suggests that bibliotherapy can be beneficial for treating clinical depression. For a study, the goal of the systematic survey was to confirm bibliotherapy’s long-term effects. The researchers included randomized controlled trial (RCTs) publications concerning bibliotherapy program treatment of depression published in English during 1990 and July 2017 after a bibliographic search. Cochrane’s Risk of Bias tool was used to examine all RCTs. Out of 306 retrieved results, ten papers (covering 8 research involving 1,347 people) were included. Researchers examined the effects of bibliotherapy during a follow-up period ranging from three months to three years, and the methodologies and analysis were of high quality. The treatment was compared to the standard therapies or no intervention in all investigations. About six research with adults demonstrated decreased depressive symptoms after long-term follow-ups, while four experiments with young people did not show significant results. Bibliotherapy looks to be effective in the long-term decline of adult depression symptoms, offering a cost-effective, quick treatment that may lessen the need for different drugs. The results of the research implied that bibliotherapy could be helpful in the treatment of a significant mental health problem. Additional research is required to strengthen the evidence of bibliotherapy’s usefulness.