13 books • 6 series
3000 Spanish Word Puzzles to Improve your Spanish Vocabulary and Fluency in Just 30 Days (Creative Spanish Learning Techniques, #4)
1000 Dutch Word Games to Upgrade your Dutch Language Skills and Knowledge in a Creative Manner (Dutch Word Games and Puzzles for the Netherlands, #4)
2000 Steps to Better French Language Skills through Innovative and Creative Word Puzzles (Creative French Learning Techniques, #6)