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I hardly like to ask such a bunch of experts as you, but here goes anyway! I'm trying to build up a good reference library for general identification purposes, based on illustrations and visual keys - in other words, not going into too much anatomical detail which would be too complicated for a non-specialist like myself.
In the case of the Diptera, I seem to be able to find only very specialist (and very expensive) single-family books, or books with attractive photographs, but illustrating only a very limited number of species.
What I really need is something which will help me above all place the flies in their respective families, and then in the most straightforward cases, get an idea also of the genus. Bearing in mind that my zone is southern Europe, does anyone have any ideas? Thanks, Sarah