When my grandfather died recently, one of the things I inherited was his "birthdates and anniversarries" (sic) paperback, in which our birthdates were written down. Now as I found my birthday in the book, I read the horoscope attached to the date.

It was creepily accurate in describing me, my family's personalities, and those of my friends. Since then the book has dissapeared, and I cannot find It.
So my main question is... is there a limited number of personalities availiable to just copy down and attach to a date?