West European Politics has released a virtual special issue on (European) populist parties.
The collection brings together a host of articles that were published in the journal over the last 20 years or so, including some evergreens by Paul Taggart, Cas Mudde, David Art, Sarah de Lange, and other chums.
Disclaimer: My own article on the AfD is included, too, which makes me feel unreasonably good. Here is the link again: http://explore.tandfonline.com/page/pgas/wep-populist
Also published on Medium.