J. J. Johnson 
Theory of Everything [EPUB ebook] 

Just because everyone else thinks you should be over it, doesn’t mean you are Last year, Sarah’s best friend, Jamie, died in a freak accident. Back then, everyone was sad; now they’re just ready for Sarah to get over it and move on. But Sarah’s not ready. She can’t stop reliving what happened, struggling with guilt, questioning the meaning of life, and missing her best friend. Her grades are plummeting, her relationships are falling apart, and her normal voice seems to have been replaced with a snark box. Life just seems random: no pattern, no meaning, no rules—and no reason to bother. In a last-ditch effort to pull it together, Sarah befriends Jamie’s twin brother, Emmett, who may be the only other person who understands what she’s lost. And when she gets a job working for the local eccentric who owns a Christmas tree farm, she finally begins to understand the threads that connect us all, the benefit of giving people a chance, and the power of love.