1.this book doesn't even list triggers in the table of contents, which means that triggers were not included in that book at all!! 2.i dont know why, but the examples in the book were so different in every page and every chapter. it was really hard to know what the examples were all about. 3.table contents and actual contents do not match sometimes. the author mixes oracle8 features with oracle 7 features while explaining about oracle7 features, which only gave me confusions. 4.the only thing that attracted me was the tips that helped me pretty much.. In conclusion, if you are a beginner to pl/sql, please do not buy this book.