Spectral and High Order Methods for Partial Differential Equations : Selected papers from the ICOSAHOM 09 conference June 22 26 Trondheim Norway The book contains a selection of high quality papers chosen among the best presentations during the International Conference on Spectral and High Order Methods (2009) and provides an overview of the depth and breadth of the activities within this important research area. The carefully reviewed selection of the papers will provide the reader with a snapshot of state of the art and help initiate new research directions through the extensive bibliography.