Ann and I recently read "Finding the Mother Tree: Discovering the Wisdom of the Forest" by Suzanne Simard.
It's a great book, but a slow read. I personally only made it half way through the book when the library notified me to return it without extension since someone else had a hold placed on it.
It's a slow read because the author recounts much personal activity interspersed with the science of the trees. e.g. climbing up trees to avoid being attacked by bears and bar fights with men in the forestry industry.
I've found a quick way to recoup the entire book without the personal stuff. Watch this 18 minute TED Talk to get the essence of the science sans small talk.
"A forest is much more than what you see," says ecologist Suzanne Simard. Her 30 years of research in Canadian forests have led to an astounding discovery -- trees talk, often and over vast distances. Learn more about the harmonious yet complicated social lives of trees and prepare to see the natural world with new eyes.
https://www.ted.com/talks/suzanne_simard_how_trees_talk_to_each_other#t-1085918