Books with genius main characters.?

I asked this before, it seems i was greatly misunderstood, the question was deleted with no best answer. let me try asking again. I want fiction, not biographies, about people with genius IQs, not greatly talented people. I have read Enders Game, Artemis Fowl, and The Genius series by Cathrine Jinks. I am looking for books similar to these. I would prefer something set in modern or future times, i also would prefer sci-fi to Fantasy, but the major point is geniuses. Also, the age of the genius does not matter, i am fine with adult main characters as well as children.