This is NOT a good book if you're looking for a quick reference and interpretation of the parts that you see listed everywhere. You will have to know almost all of your astrological terms to figure out the formulas, because there isn't a table listing Bonatti's parts. But if you are an advanced astrologer, this book lists and describes some very interesting parts that can still be used in natal and horary astrology. A description of how to take the formula as well as definitions for the following parts are included: The parts of the 7 planets, parts of the 12 houses (each house has more than 1 part associated with it) and also other parts such as parts pertaining to crops and other things. Again, if you're advanced, this is a good book to have it your collection of reference material.