Top books on r/German

Hammer's German Grammar and Usage (German Edition)

English Grammar for Students of German

German Grammar Drills

German: How to Speak and Write It

Schaum's Outline of German Grammar, 5th Edition

A Frequency Dictionary of German

Learn German With Stories

Übungsgrammatik für die Grundstufe

A Practice Grammar of German, New Edition

Practising German Grammar

Handbuch zur deutschen Grammatik (World Languages)

Basic German Vocabulary (Langenscheidt Reference)

Assimil German with Ease - Learn German for English Speakers...