15 Minute German: Learn in Just 12 Weeks (DK 15-Minute Language Learning)

German–English Bilingual Short Stories for Kids: Illustrated 5-Minute Tales to Build Vocabulary and Learn Naturally

Learning German (Badly)

Learn German Without Studying: 5-Minute Bilingual German–English Stories with Side-by-Side Parallel Text to Understand Naturally, Build Confidence, ... Studying: Side-by-Side Bilingual Stories)

Learn German Vocabulary with Word Search Puzzles Volume 1: Study German Words with 108 Vocab Building Review Puzzles in Just Minutes