Pi's daughter So-Young studied physics, and married fellow physicist Roman Jackiw.
He also published various essays, including "Nunborachineun bamui chueok" (눈보라 치는 밤의 추억, Memory of a Snowy Night), "Gidarineun pyeonji" (기다리는 편지, The Waiting Letter), "Muje" (무제, Untitled), and "Naui pail" (나의 파일, My File).
Because his essays are beautifully express the emotions of everyday life through an intimate and delicate style, they tend to read like prosaic lyric poetry.
He also published works on English literature such as "Ellijabeseujoui gyususiin" (Elizabethan Female Poets) and "Seikseupieoui soneteu" (Shakespeare's Sonnets).
The main works Affinity, Essay, Flute Player can be found in Korean textbooks as part of a regular school curriculum.