Books are not usually rated like movies, no. The thinking is, if you're smart enough to read a thick book, you're smart enough to deal with whatever it talks about.
The Veteran Story - 2007 is rated/received certificates of: USA:TV-PG
Comic Book Men - 2012 is rated/received certificates of: USA:TV-PG
No, books do not have maturity ratings like movies and games do. Mostly people figure that if you're old enough to read a hard book, you're old enough to understand what's inside it and mature enough to handle the story.
Hillbilly The Real Story - 2008 TV is rated/received certificates of: USA:TV-PG
The Elizabeth Smart Story - 2003 TV is rated/received certificates of: Australia:PG USA:TV-PG
Superman - 1996 A Fish Story 3-9 is rated/received certificates of: USA:TV-PG
Beyond Sight The Derek Rabelo Story - 2013 is rated/received certificates of: USA:M/PG
The Ron Clark Story - 2006 TV is rated/received certificates of: Australia:PG Singapore:PG USA:TV-PG
The Neighbors - 2012 A Christmas Story 2-11 is rated/received certificates of: USA:TV-PG
Save Me - 2013 The Book of Beth 1-1 is rated/received certificates of: USA:TV-PG
TV PG
Hitler's Pawn The Margaret Lambert Story - 2004 TV is rated/received certificates of: USA:TV-PG