Liam lost his memory and forgot every single time he spent with zayn. Zayn was all broken and lost since liam said he didn't know him at all. and they started over with being friends since liam's 19th birthday when zayn gifted him a book explaining him all those 19 reasons why he loved him and how much he missed him. and with that precious gift, liam started to realize what he was missing out and the faded memories came to life. || To Know those 19 reasons, read this book up. hope you'll like it. ||