  Lewis’s book gives a very good presentation of  the most influential and well-developed interpretations of the  formalism and provides an even-handed comparative assessment. It  provides is an up-to-date survey of the landscape with  sophisticated analysis and commentary. The book is well-suited  for use in or for the layperson with a serious interest in  foundations. The discussion is sophisticated without undue  technicality and manages philosophical analysis in a jargon-free  way.  