Excludes trilogies since I made a separate list for those
  1. Pendergast series by Douglas Preston and Lincoln Child
  2. Sookie Stackhouse series by Charlaine Harris
  3. Outlander series by Diana Gabaldon
  4. Stephanie Plum series by Janet Evanovich
    But around 15 or 16 they really lose steam
  5. Harry Potter by J.K. Rowling
  6. Game of Thrones by George R. R. Martin