Instruct: Classify Amazon reviews into positive or negative sentiment
Query: useless book about pojos in context of spring, ejb, hibernate and jdo

the book lightly covers the use of pojo in spring, ejb, hibernate, and jdo. the coverage of each topic is like say 30-40%. you are probably better of getting spring and hibernate books to get complete picture of pojos in spring and hibernate. all in all, this book is pure waste of time and shouldn't exist at all.