i mostly read genre stuff (science fiction, fantasy, mysteries, humour), my all time favourite author being terry pratchett. "guards! guards!" is a great first book of his, it's humorous fantasy but also with a lot of depth and superb character development. if you like that, go on to read the entire discworld series, they are almost all excellent.

science fiction - i would recommend lois bujold's "vorkosigan" series. start with "the warrior's apprentice"; there are two prequels but they can be read on their own at any time and i think "the warrior's apprentice" is a better introduction to the series.

another very engaging series is harry kemmelman's "rabbi small" mysteries, they are both great mystery novels and an overall story arc of a young rabbi establishing himself in a small new england town.