All excellent suggestions.
A few of my own....
Since we are in the ADPi forum, if you are interested in work done by sisters, try something by Carol Shields - The Stone Diaries won the 1995 Pulitzer. Another new book is Ten Minutes from Normal by Karen Hughes, but you'll probably want to make that decision yourself based on your political leanings! I haven't read it yet myself to recommend or not....
Then some other stuff I've read recently and enjoyed: Girlie stuff - Bergdorf Blondes, Something Borrowed, Chloe Does Yale, The Devil Wears Prada, The Nanny Diaries (but their followup, Citizen Girl, SUCKS). The Right Address and Wolves in Chic Clothing are from the same authors and are good reads.
I've also read all the Dan Brown books. Anxiously awaiting the new one set in Washington DC!
A really neat book is Love, Ronnie - It is Ronald Reagan's personal letters to Nancy. It came out 3 or so years ago but is very touching and not political. Just a man's thoughts and feelings to his wife.