Looch is a very interesting set of 3-D board books with more than 5 million copies sold worldwide. There are 2 books in a set: (1) The Story of A Hole & (2) The Day We Were Together.
"The Story of Holes" was first published in 2008. It was so well-received that it has since been translated into 7 different languages. "The Day We Were Together" was published 2 years later in 2010 and was similarly well-received.
Board books. Simplified chinese. There are only one line per page. With no hanyu pinyin.