Cheating slightly, as I haven't read it cover to cover (although that would be a feat in itself): I have however gone out several times with it over the past two weeks, and gained a much stronger sense of the overall genera of the trees I keep seeing, if not always the exact species. The pictures are great, and there are several helpful tables in the front for use in-field, such as leaf diagrams and stem/bud diagrams. Perfect for beginners, but there's enough detail here for experts too. Had a couple of exciting finds - identified a blue atlas cedar in the Vienna Central Cemetery, while also realising that the enormous, peculiar, pungent seed/fruit that I used to find in Carol Park in Bucharest belong to the osage orange tree, which are a notably rare tree in the British Isles (but incredibly easy to access within Bucharest!) In conclusion, I can safely say tree-spotting is significantly easier than birdwatching; the targets are much larger and noticeably slower.