From the reviews:
A good starting point to learn about Heltons influential work at the edge of Operator theory and systems engineering. Many of the main topics in this area are covered by the 19 contributions, all written by the main players in the field. brought in the form of a tutorial, a survey, or even a shorter note, but all very readable and up-to-date. it can be safely recommended to specialists and to students at an advanced mathematics or engineering level as well. (A. Bultheel, The European Mathematical Society, September, 2012)
