Isabella Garcia is in a position millions of girls would die to be in. She's Zayn Malik's best friend. But this doesn't come in handy when Harry falls for her. Zayn will stop at nothing to protect her, while Harry will stop at nothing to win her over. And of course there's Jake, Bella's best guy friend, but does he want more? Find out in Truly, Madly, Deeply. {partnership writing}