Introducing: the perfect book for passing around at sleepovers! The Secret Language of Birthdays: Teen Edition provides astrological insight into the character of those born on each day of the year. You’ll find quizzes, profiles, ah-dorable doodles and tons of personal extras. Discover your Best Pet (Puggle?), Shopping Style (eco-chic…) or Best Date (fly fishing— reel ‘em in!) This personality bible is so funny and on-point, you’ll want to read the descriptions of all your friends’ and crushes’ and family members’ birthdays, too! It’s the key to knowing yourself and all your friends.

So here’s a tip: Find out the secret. Share with friends. Rinse. Repeat.