Letters to His Son

I second the votes for War and Peace, Anna Karenina and Brothers Karamazov ... but I think I can add a unique (and very special to me) entry with: Chesterfield's Letters to His Son: "Begun in the 1737 and continued until the death of his son in 1768, Chesterfield wrote mostly instructive communications about geography, history, and classical literature, – with later letters focusing on politics and diplomacy – and the letters themselves were written in French, English, and Latin, in order to refine his son's grasp of the languages."[1] [1] https://en.wikipedia.org/wiki/Philip_Stanhope,_4th_Earl_of_C... (https://en.wikipedia.org/wiki/Philip_Stanhope,_4th_Earl_of_Chesterfield#Letters_to_His_Son)