Oh my, that's a BIG question. Lemme think.
If you're into detective fiction; I'd say Murder of Roger Ackroyd (Agatha Christie) or Salvation of a Saint (Keigo Higashino).
If you like Poetry, I'd say the anthology "Poems to live your life by" (Curated by Chris Riddell). If you can read Punjabi, definitely Shiv Kumar Batalavi and Paash's works.
If you like fantasy, I'd say the Mistborn series by Brandon Sanderson.
If you like Graphic novels, I'd say Maus (Art Spiegelman).