※This e-book is a multi-book that includes audio files.
※This e-book contains multimedia and is a large file size, so downloading may take some time depending on your communication environment.


A proven method for learning complete sentences, used by 16 million people worldwide.
The easiest American Standard English + 3-way training method that learns with your whole body → Automatic speaking of English sentences

A mega-bestseller, selling over 16 million copies worldwide since its first publication in 1963. A domestic language bestseller, with a total of 220,000 copies sold as of December 2016 after the publication of the revised Korean edition in 2012 (ranked #1 among foreign language textbooks in Kyobo Book Centre's 2013 annual report).
A revised Japanese edition was published by Asahi Press in Japan in 2014, and a revised Chinese edition was published by Jinyi Jinzhong Publishing in China in 2015.

The U.S. State Department commissioned the University of Michigan to disseminate standard English, and linguist Cornelius conducted extensive research and development.
It is composed of easy sentences that seem to be found in middle school English textbooks.
This is a whole sentence learning method that learns standard English sentences that are easy and practical to understand anywhere in the world without considering grammar or word order, and it is a 3-way training method (infinitely repeated learning with textbooks, MP3s, and brain input programs) that learns whole sentences with your whole body.
Step 1.
Speaking in full sentences → Step 2.
Memorize the entire sentence → Step 3.
Training with patterns → Step 4.
This is a four-step learning process of training through conversation.

There are five versions of training MP3 files for free download (e900.co.kr or ybmbooks.com), a two-stage training program for free with a complete sentence brain input program (provided via QR code in the textbook), a portable memory book that can be opened anytime, anywhere, and the English 900 Cafe (e900.co.kr) that will accompany you until you complete your goal.