Iain
- Gulls of North America, Europe, and Asia by Klaus Malling Olsen and Hans Larsson (best book)
- Gulls a guide to identification by P.J. Grant
Both available through Chapters or at the Outdoor Bookstore on Adelaide St. in Toronto.
I just bought the Olsen/Larsson book from Chapters last week. I ordered it at the store and it took only 2 days to arrive there.
I highly recommend the Olsen/Larsson book (best I have ever seen) but be aware that these books are not cheap.