Archived tweet #11269 from the @leastfixedpoint Twitter Archive@duncanmak @abecedarius @flippac Craig Finseth's book, "The Craft of Text Editing". It's great: finseth.com/craft/ . I worked from it (plus some other ideas like ropes, pure-functionalish designs, etc) when building rmacs: github.com/tonyg/rmacs (which is still unfinished)