Depending on how hirsute your friends are, you may or may not know that November is Movember, a pretty fun time for guys to try out some new facial hair (handlebar mustache!).

But the coolest Movember project I’ve seen is by the Glendale Public Library Teen Services. They’re sharing pictures of readers posing with creative “mustaches” and books they recommend–ie, books they #MustacheYouToRead–on Twitter and Facebook. And you can join them:

“We’d love to see #MustacheYouToRead trend, so if you have any books you’d like to recommend, tweet them to us (or post them here) and let’s let the world know about all the awesome books teens are reading!”

Remember, you don’t need real facial hair to join in. Cut out a paper mustache or even use your finger. Share your recommended reads with the hashtag #MustacheYouToRead. Dumbledore is already on it.