This monograph is one of the first to systematically address an increasingly important problem, namely the reaction to excesses of power, or unlawful acts, of the Security Council...By its subject, and the way it goes about addressing it, this book is solidly devoted to these increasingly pressing questions. The author demonstrates several qualities: expertise...; a distinctive subtlety and a capacity to sustain a powerful argument; a remarkable knowledge of general international law which underlies and visibly strengthens the argument; a concentration on the essential questions only [and] a palpable mastery of the subject ... . In sum, Dr Tzanakopoulos offers us an image of a next generation of international lawyers of which we can be proud.