In the birding world, at least at the moment, the Sibley book is considered the bible of identification. Is there a similar book (or contenders) that cover the significant majority of the conifers I'm liable to run across? I generally range from Arizona through California, Oregon, and Washington, if that matters. I've run across several smaller books that seem to leave out a great many of the conifers that have been planted in cities and towns, and only wish to deal with "native" trees. I'd like to find something much more inclusive.