The book , suitable for students ( also PHD candidates) and professors of Administrative Law, features a collection of essays that discuss administrative justice systems and their organisation, specifically examining the relationship between Higher and Regional Courts, all from the perspective of ensuring full legal certainty. The selected countries ( Austria, Belgium, France, Italy, Germany, Portugal and Spain) are a useful examples because they include both Unitarian and Federal States. The book offers an interesting overview of the legal systems of countries such as Austria and Portugal, not frequently analysed.

Key words: administrative justice- regional courts - legal certainty