I just found this interview from the Chloe King's writer/producer
Were you given any restrictions on how closely your story had to follow those set up in the book?
No. The books are certainly where everything started, but TV fiction and book fiction are very different animals. We knew from the beginning that we would have to sustain Chloe's story for much longer (hopefully) than things go in the books.
We also didn't want people to read the books and feel like they didn't have to watch the series, because they already knew everything that was going to happen. So we took a "blue skies" approach. People can still read and enjoy the books, but at the same time, reading the books doesn't spoil the TV series in any way, because anything can happen.
Are you surprised at how adamantly viewers have taken to Alek and Chloe?
This was a bit of a surprise. We expected everyone would start on Team Brian and then migrate to Team Alek as the season went along, but the opposite has happened. People seemed to start on Team Alek at the beginning, but then as Brian's mystery has developed, Team Brian has gained a lot momentum.
If, fingers crossed, you get a green light for season two, will the focus continue to be on the love triangle?
Most definitely, although it's going to play out very
differently from season one (sorry, that's all I can say).
full interview here:
Nine Lives of Chloe King Exclusive: Andy Reaser Previews Finale, Team Alek vs. Team Brian - TV Fanatic