The book "Fourth Order Finite Difference Method" provides a comprehensive analysis and application of a fourth-order finite difference method for solving a class of singular boundary value problems. It explains how the finite difference method is used to approximate solutions for boundary value problems by employing difference quotients to approximate derivatives. Special attention is given to the modification of the original differential equation at singular points to enhance the accuracy of the solutions. The work also includes the solution of model problems and compares the numerical results with the exact solutions, highlighting the effectiveness of the proposed method. This technical book is aimed at students and professionals in the fields of mathematics and natural sciences who are engaged with numerical methods and their applications in the theory of differential equations.