Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: This book is only for the dedicated.

Frank M. D'Alessandro's book is not for the first-time Sacco and Vanzetti reader. "The Verdict of History on Sacco and Vanzetti" is the fourth book I've read on the subject, and I still found it difficult to follow. The writing and organization are both poor. There are few references given in the test, and there is no bibliography. Dr. D'Alessandro is a very strong supporter of the innocence of the two Italian anarchists and makes no attempt at a balanced presentation. He does, however, make some strong points which had not occurred to me before. I would like to see the same material presented in a more formal, rigorous way with refutations on the points made by recent "guilty" authors like Francis Russell.