Teach Yourself Improve Your German
Heiner Schenke & Paul Coggle
Dinge, die wir heute sagten
Judith Zander
Digital Electronics Demystified, A Self-Teaching Guide
Myke Predko
Demystified (4)
Die doppelte Paula
Theo & Klara
German: An Essential Grammar
Bruce Donaldson
Routledge Essential Grammars (1)