It is well organized with plenty of examples.  One thing that seems to be missing is a section on the author's notation; preferably in the Preface.  For instance, 1) double roots are noted by a comma seperated subscript, 2) an h subscript indicates a homogeneous solution.  These notations are apparent as you read through the text, but not all authors use a common notation.  A seperate section in the front can be helpful.