Northern & Central Midwest
SafeLawns.org is a non-profit organization dedicated to promoting natural lawn care and grounds maintenance. The site provides a free newsletter, information about non-toxic products, lawn care, seminars and a national "safelawns initiative" to promote healthy lawn care. This is good information to help get your lawn in shape next year.
The Organic Lawn Care Manual
In The Organic Lawn Care Manual (Storey Publishing, 2007; $19.95), author Paul Tukey provides a lively discourse on all matters related to lawns, from taking care of your soil and types of grass for organic growing, to how to fertilize, water, and mow. His writing style makes learning about turf a lot of fun.