"Influence of non-thermal electron on heavier mass negative ion plasma" is a book mainly based on the publication of that manuscript in Sri Lankan Journal of Physics in March,2019. In this book heavier negative mass is considered . Moreover positive ion, negative ion and positron with non-thermal electrons are critically analysed and discussed obtaining some important and interesting results.Effect of positron with suitable graphical approach is a new reflection regarding amplitude and width. The stability of the solitary waves is discussed analytically very carefully. Amplitudes in non-thermal and isothermal plasmas are compared for some heavier negative ion plasmas . I think that everyone will be much benefitted after reading this book and at the same time I shall be much grateful if any reader gives me some suggestion for upgradation of this book in near future . A lot of thanks to my editor and all members of LAP publishing.