for Time to Fly by Laurie Halse Anderson
There's a flock of parrots in Zoe's backyard! No one knows where they came from, but they aren't as big a surprise as the sight of Zoe's mother, who has just arrived from California. She wants Zoe to move back home with her - something Zoe has been waiting to hear for months. But why does leaving Ambler and Dr. Mac's place seem so much harder than she expected?
Publisher description retrieved from Google Books.