Playing Truth or Dare in the No-Man's-Land

Recommend Some Books with Smart Characters, No Harem, and No Cheap Humor,

Looking for books like Please Call Me Ghost Messenger. I'm so desperately out of things to read. Recommend me some good books, any genre is fine. Just not the ones already popular on the rankings. No womanizers, saintly protagonists, or especially lowbrow humor that the author thinks is hilarious. I just feel...