I've been collecting them ever since they were first released. They are free and the recent publications are available at any Toronto Public Library.
Great collections of photographs, drawings and specific ecological info relating to Toronto's biodiversity.
More info: Biodiversity Booklets from Toronto's Public Library
Just recently, they released "Trees, Shrubs and Vines of Toronto".
What a great little booklet. I won't give away any spoilers, so - go out and get your own!
Soon to be available:
- Mushrooms of Toronto
- Bees of Toronto