This touching, hilarious tragi-comedy by award-winning author Susin Nielsen proves: Life is out to get you. But so is love. A quirky alternative to the "sick lit" genre for YA readers.     Petula's funny, and a crafting genius, but no social star at high school, and it doesn't help that she's isolated herself after her adored toddler sister died. Petula feels responsible for this death, though her parents say it was a tragic accident. No one's fault. Now, Petula sees danger e