Handbook of Matrices
Helmut Lütkepohl
Wiley
This book is in fact an extensive collection of results and definitions on matrices. If you want a book that develops the theory of matrices, this is not what you are looking for. But, if you work with matrices and you need a  quick reference to help your research for example, this is the book for  you. It is well organised and contains quite a number of results on  matrices. At the same time   it provides a number of references for  additional information on a particular subject.