Happy holidays! GalleyCat readers around the world have been building Book Christmas Trees all month.

After we shared a photo of a Book Christmas Tree, many of our readers started building their own. We’ve collected three trees in our holiday slideshow (embedded above)–a virtual Book Christmas Tree Farm. You can see 21 more trees in last year’s collection.

Building a tree of books is a simple but powerful way to show your support for print books and bookstores in this digital age. If you build your own, be sure to email GalleyCat a photograph.