JALEX, "4 letters, 1000 words--How many 4-letter words do you know? (JALEX Word Learning Tool for Learners of English)"
ASIN:B00EXQFTQM | 2013 | 496 pages | EPUB/MOBI + PDF | 3Mb + 3Mb

This book is not a collection of so-called "four-letter words." The headwords of this book are 4-letter words which are used frequently in books, magazines, newspapers, Internet pages etc.

This book is made mainly for learners of English. To learn a language, you have to learn or memorize words. But that is not necessarily an interesting part of learning a language.

We put the headwords in our unique puzzle-like or game-like style. Please enjoy learning English words with this book.