Every library has some beautiful books about gardening, but don't let nice glossy pictures sway you. Some of the best books don't look like that - they have good information rather than dreamy pictures. Choose your books carefully.
Locally, author Sher Leetooze has put together some informative gardening books:
Companion Planting What plants to grow beside one another for optimum results
Birds, Bugs, Bees and Butterflies What birds eat and how to attract them. What bugs eat. What bugs you don't want in your garden. How to encourage bees and butterflies.