The purpose of this study is twofold: to examine the characteristics of reading passages’ themes of the current North Korean High school English textbooks, and to find out the similarities and differences between North and South Korean textbooks in terms of the above characteristics. To this end, we analyzed three North Korean English textbooks and the related national curriculum which were revised in the Kim Jong-un era. The results show that topics such as science and environment were introduced most frequently in the English textbooks. In addition, various topics such as school life, foreign cultures and stories appeared in the reading passages in a balanced way. This confirms that North Korea attempts to teach English through themes of a wide range of topics. And some materials that support socialism and the Kim Jong-un regime were also found. Interestingly, compared to previous studies, no materials containing anti-American or anti-South Korean attitudes were found. Comparing the contents of two Koreas’ English textbooks, we found that English textbooks in North Korea deal with themes similar to those in South Korea that follow the standards set forth in our curriculum. Through this study, we hope to understand a glimpse of reality, which is reflected in the textbooks, of North Korea's English education.