Mother Nature Network is giving away some of our favorite green books to keep you busy by your favorite low-carbon fireplace this winter. And best part of all, if you're our Facebook fan, you're already entered to win. 

One lucky Facebook fan will win the following six books:

Moral Ground: Ethical Action for a Planet in Peril, Kathleen Dean Moore and Michael P. Nelson

Authentic Ecolodges, Hitesh Mehta

36 Acres, Tobin Fraley

The World in 2050, Laurence C. Smith


Better Living through Science, Mark Frary

Unexpectedly Eighty: And Other Adaptations by Judith Viorst

Unexpectedly Eighty: And Other Adaptations, by Judith Viorst

On February 21, we will pick one Facebook fan (via randomized selection) to win these six books, so please FAN US NOW. If you are an existing Facebook fan of Mother Nature, don't worry — you're already entered to win.  

Our Facebook page gives you the daily rundown of the top stories on MNN. Our community is growing, and we want you to grow with us!  

Read the official rules here.