The Secret Language of Birthdays

Many people have long suspected, as astrologers believe, that the day you were born affects your personality. While no one knows exactly how or why, birthdays do tend to be uncannily accurate predictors of psychological tendencies.

The Secret Language of Birthdays by Gary Goldschneider and Joost Effers describes in detail the characteristics and quirks of personality associated with being born on a particular day of the year.