Ruby lost and found / Christina Li.

"Thanks to her Ye-Ye's epic scavenger hunts, thirteen-year-old Ruby Chu knows San Francisco like the back of her hand. But after his death, she feels lost, and it seems like everyone--from her best friends to her older sister--is abandoning her. After Ruby gets in major trouble at school, her parents decide she has to spend the summer at a local senior center, with her grandmother, Nai-Nai, and Nai-Nai's friends for company. When a new boy from Ruby's grade, Liam Yeung, starts showing up too, Ruby's humiliation is complete. But Nai-Nai, her friends, and Liam all surprise Ruby. She finds herself working with Liam, who might not be as annoying as he seems, to help save a historic Chinatown bakery that's being priced out of the neighborhood. And alongside Nai-Nai, who is keeping a secret that threatens to change everything, Ruby retraces Ye-Ye's scavenger hunt maps in an attempt to find a way out of her grief--and maybe even find herself.