The Secret Garden - Talking Beetles and Signaling Trees: The Hidden Ways Gardens Communicate by David Bodanis
Fascinating information about what plants do to thrive and survive.
AND...
The Secret Garden by Frances Hodgsen Burnett
I read this children's book to my daughter when she was 10. She has no interest in gardening and didn't want me to read this book to her, but she ended up loving it. The descriptions of children discovering a neglected garden and bringing it back to life are beautiful and inspiring. Reading this together afforded me the one and only opportunity to share my love of gardens and gardening with my daughter.