@Hogwartsafeplace considering the fact that u would read this (since this was posted such a long time ago), I'd say I'LL GIVE YOU THE SUN by JANDY NELSON. This book is so underrated, but lemme tell u that this book has it all. An amazing sibling duo, 2 cute love stories and the concept of fate that literally changed my viewpoint foreverr!! I'd say its a must try!!!!