The "Weeds and What They Tell Us" product would be an excellent fit for anyone interested in understanding and appreciating nature's hidden communication through vegetation.
The Hidden Life of Trees: What They Feel, How They Communicate - Discoveries from a Secret World
Good Bug Bad Bug: Who's Who, What They Do, and How to Manage Them Organically (All you need to know about the insects in your garden)
Bill McHenry Jim McHenry What Therapists Say and Why They Say It (Paperback)
RHS What's That Weed?: Know Your Weeds and Learn to Live with Them
The Secret Life of Trees: How They Live and Why They Matter
What You Say (and What You Do)