This is a book about the science of personality classification according to Astrology. You might  be able to record a friends birth date but how great would it be  to have knowledge about their main focus in life as well. To know  the principle  that governs the direction of their  life, to know what  their favoured colours are, what the best gift for them would be, what  some of their favourite flowers, herbs and spices are. You can have all this rich information in point form and at your finger tips with this attractive and  informative birthday calendar that will  serve you for many, many years to come.