Having said all that, I know what the next question will be, because  hundreds of you have already asked it of me.  Will the show 'spoil' the  novels?  
Maybe.  Yes and no.  Look, I never thought the series  could possibly catch up with the books, but it has.  The show moved  faster than I anticipated and I moved more slowly.  There were other  factors too, but that was the main one.  Given where we are, inevitably,  there will be certain plot twists and reveals in season six of GAME OF  THRONES that have not yet happened in the books.  For years my readers  have been ahead of the viewers.  This year, for some things, the reverse  will be true.  How you want to handle that... hey, that's up to you.   Look, I read Andy Weir's novel THE MARTIAN before I saw the movie.  But I  saw the BBC production of JONATHAN STRANGE AND MR NORRELL before I  finally got around to reading Susanna Clarke's novel.  In both cases, I  loved the book and I loved the adaptation.  It does not need to be one  or the other.  You might prefer one over the other, but you can still  enjoy the hell out of both.
Of course, there's an aspect to our  situation that did not apply to either the Weir or Clarke cases.  Those  novels were finished before they were optioned, adapted, and filmed.   The case of GAME OF THRONES and A SONG OF ICE AND FIRE is perhaps  unique.  I can't think of any other instance where the movie or TV show  came out as the source material was still being written.  So when you  ask me, "will the show spoil the books," all I can do is say, "yes and  no," and mumble once again about the butterfly effect.  Those pretty  little butterflies have grown into mighty dragons.  Some of the  'spoilers' you may encounter in season six may not be spoilers at all...  because the show and the books have diverged, and will continue to do  so.  
IF YOU HAVE NOT SEEN ALL FIVE SEASONS AND READ ALL FIVE BOOKS, STOP HERE!
Just  consider.  Mago, Irri, Rakharo, Xaro Xhoan Daxos, Pyat Pree, Pyp,  Grenn, Ser Barristan Selmy, Queen Selyse, Princess Shireen, Princess  Myrcella, Mance Rayder, and King Stannis are all dead in the show, alive  in the books.  Some of them will die in the books as well, yes... but  not all of them, and some may die at different times in different ways.   Balon Greyjoy, on the flip side, is dead in the books, alive on the  show.  His brothers Euron Crow's Eye and Victarion have not yet been  introduced (will they appear?  I ain't saying).  Meanwhile Jhiqui, Aggo,  Jhogo, Jeyne Poole, Dalla (and her child) and her sister Val, Princess  Arianne Martell, Prince Quentyn Martell, Willas Tyrell, Ser Garlan the  Gallant, Lord Wyman Manderly, the Shavepate, the Green Grace, Brown Ben  Plumm, the Tattered Prince, Pretty Meris, Bloodbeard, Griff and Young  Griff, and many more have never been part of the show, yet remain  characters in the books.  Several are viewpoint characters, and even  those who are not may have significant roles in the story to come in THE  WINDS OF WINTER and A DREAM OF SPRING.
GAME OF THRONES is the  most popular television series in the world right now.  The most pirated  as well.  It just won a record number of Emmy Awards, including the  ultimate prize, for the best drama on television.  It's an incredible  production with an incredible cast and crew.
WINDS OF WINTER should be pretty good too, when it comes out.  As good as I can make it, anyway.
Which is a long way of saying, "How may children did Scarlett O'Hara have?"
Enjoy the show.  Enjoy the books.  
Meanwhile, I'll keep writing.  Chapter at a time.  Page at a time.  Word at a time.  That's all I know how to do.