I didn't know that! Thanks!Lefebvre- I haven’t read that one, good to know. @Tom Hart, I see this book is available in Korean? https://www.google.com/amp/s/rpkorea.org/2018/02/19/%EC%B1%85-%EA%B5%AC%EC%9E%85songs-of-Jesus-in-korean/amp/
If so you should buy some and pass them around!