The book Matrices is consists of five chapters. In chapter 1, we have discussed Introduction, Application of Matrices, Operations on Matrices, Types of Matrices and Inverse of a Matrix. In Chapters 2, we have discussed Elementary Transformation a Matrix, Inverse of a Matrix by Elementary Transformations (Gauss-Jordan Method of Finding the Inverse) and Rank of a Matrix. In Chapters 3, we have discussed Simultaneous Linear Equations. In Chapters 4, contains definition of Eigen Values and Eigen Vectors, theorems and examples. In Chapters 5, is devoted Diagonalization of Matrices. Also at the end of every chapters, multiple objective questions are discussed.