Essential Grammar in Use
Murphy

Grammetiktraining Englisch
Seebauer/Rovina

Effective Presentations
Comfort, Jeremy

Education in Britain and America
Stenzel, Elke u.a.

Muret- Sanders English - German
Langenscheidt's

English Grammar excersise
Hoffmann/schmidt

English in Mind 2 Student's Book
Puchta, Herbert / Stranks, Jeff

Großer Lernwortschatz Englisch
Hueber

English for Customer Care
Richey, Reosemary

Focus on Modern Careers 2 Extra Pra