Teo Aik Cher’s words and illustrations have been featured in numerous publications. He has illustrated for books by trainers such as Adam Khoo, Conrad Alvin Lim and many others. His cartoons were also featured regularly in the Chinese newspaper Lianhe Zaobao. Aik Cher has written seven books for teens: Why Procrastinate?, Why Take Action?, Why Simplify?, Why Be a Champion?, Why Study Smart?, Why Worry? Be Happy! and Why Be a Leader?. Aik Cher’s books in the Why? Series have been translated into Arabic, Bahasa Indonesia, Chinese and Vietnamese. These books have also been featured in the Popular Bookstore bestseller list and The Sunday Times bestseller list.