Wool series by Hugh Howey (post apocalyptic)
Renewal series by JF Perkins (PA)
Sisters of Glass by DW St John (sci-fi)
Enders Game + series by Orson Scott Card (sci-fi)
Temporary Duty by Ric Locke (sci-fi)
These are just a few from my recent Kindle list. 90% of what I read comes from these two categories.