Seeking contact information for Sonja Kesserich

Sonja Kesserich is co-author of the Inform Beginner’s Guide.

I’d like to correspond with her about maintenance of the Guide.

The email address at the ‘moth.jazztel.es’ domain no longer works; the domain doesn’t resolve.

Who out there has a current email address for Sonja Kesserich? (Roger Firth tells me he hasn’t got one.)