"Happy reading!" - Korean doesn't seem to have a phrase with the same meaning and as short. (즐거운 독서(를) 하세요 would be the direct translation, but it doesn't sound very natural) I can think of a few different ways of saying it. - 기분 좋게 독서를 즐기세요. Have a pleasant time reading. - 즐거운 독서에 빠져 보세요. Immerse yourself in happy reading. - 책 읽는 즐거움을 만끽하세요. Pamper yourself with the pleasure of reading. * 만끽하다 = take a full enjoyment of something.