Having read some of the reviewers before me, I ought to warn the reader the book is more about a research of the surrounding facts of the Popper/Wittgenstein confrontation than, as some of the naive reviewers seem to have expected, an in-depth account or opinion of the philosophy of both.The book is true to its nature and in that sense it is outstanding indeed. Seldom will anyone obtain, in one piece, such a detailed portrait of two of the most outstanding intellectuals of the XX th Century. It may be curious to ascertain that these men, despite being born and educated in Austria, came to expose their differences before the english speaking world, where political tolerance has been rooted for centuries.It is a gripping read and one that will make you re-live with passion the beautiful tradition of philosophical awe, love for logic and the un-ending quest in search for the truth.