Individuals' Value system can be altered using programmed regular reading of positive literature materials. Effects of bibliotherapy on Behaviour Modification of Adolescents is a vital response to overcome social behaviour problems using regular reading of positive literature. The author brings to knowledge the fact that,just as the reading of positive literature can alter the value system of individuals from negative to positive,regular reading of negative literature materials can on the contrary, result in emotional bad health for users. The emphasis should always be on regular use of positive literature materials. Bibliotherapy is effective for use as therapy in any social re-engineering process of behaviour modification, and is perhaps capable of solving the prevalent national and global behaviour problems ravaging the Society.