In this text Ayatullah Dastghaib has exhaustively explained the phenomenon of sin, the classification of sins, the necessity of avoiding them, He has described fifty different types of Greater Sins such as: association with God (Shirk), fornication, drinking alcohol, gambling, disrespect towards parents and cutting ties with relatives.
See also volume 2 and 3 of this text.
Link to volume 2:
Link to volume 3: