I enjoyed this book but so much of it isn't about hawthorns in any way whatsoever.
In the group I facilitate we have teaching days when I do something the group calls 'brambling'; making connections between seemingly disparate things. Bill Vaughn is a great brambler, and has an engaging writing style, but he follows a tangent a bit further than is good for anyone; sometimes to the point where I forgot what the book was about.
Also, I really did want to know about hawthorns, rather than about how a range of other shrubs can be made into hedges, the challenges of the WWII battles of Normandy, or how forensic scientists date the death of a body from the larvae of flies! Maybe I feel better for learning all these things but I feel a little bit as though I have been locked in a room and forcibly educated.
Amidst all of this I did though learn lots about hawthorns, so it was possibly worth it. I am off for a lie down somewhere dark.