Mind the gaps ...

This is our current collection of butterfly guides:

A field guide with mostly photos and a guide with drawings (by Richard Lewington, of course), both for Britain. A quick ID chart. A (Dutch) guide for northwestern Europe. And a guide for the whole of Europe.

And this is our current collection of dragonfly guides:

A field guide with mostly photos, for Britain. A quick ID chart. And a guide for the whole of Europe. 

You do notice the obvious gaps, right?

Problem solved!