Alec Greven is 9 years old. He's written a book, How to Talk to Girls.

He first wrote a shorter version for a grade 3 school assignment but now he's hooked up with a major publisher. Alec has only had one girl crush so far in his life but he has watched girls and boys interact in the schoolyard and he bases his advice on this empirical knowledge.

His tips include “You also have to be aware that girls win most of the arguments and have most of the power. If you know that now, things might be easier.”

And...

- "Control your hyperness (cut down on the sugar if you have to)."

- "Don't act desperate"

He's already planning his second book, "How to Talk to Moms".

See him in the video below.