If you’re a non-believer in astrology, spend a little time with the Secret Language of Birthdays by Gary Goldschneider and Joost Eiffers. We guarantee it’ll make a believer outta you.

It’s a weighty tome, to be sure. Each birthday gets two full pages of on-target information as well as the usual celebrity birthdates, etc. Now this is a good book to have. Even better is one of the companion books, the Secret Language of Relationships.

Describing 1,176 possibilities, The Secret Language of Relationships sheds light on the classic questions–the hows and whys of chemistry in relationships. Is there a prime ingredient for love at first sight, a Fred Astaire and Ginger Rogers of it all. An entertaining exploration of the very thing we cannot do without–each other–this wonderful volume explains why we feel the way we do about the people in our lives, and how–if necessary–to make it better.