I am looking for a good and comprehensive book or online resource on systems of linear ordinary differential equations. It has to describe well the solution, stability and determination of arbitrary constants of n x n systems in normal form, including a lot of nonhomogenous cases.
Most of the resources I seem to find are about 2 x 2 or 3 x 3 system and no generalisations to the nth dimension are made.
Since you are asking specifically about linear systems, check out this book: "Linear Ordinary Differential Equations" by Coddington and Carlson.