The Things with Wings by Gregory J. Holch

Vanessa pushed the fast forward button.
"I don't think there's anything more," she said, and just then there was the high pitched burble of a voice from the tape player.
"Go back and play that at normal speed," said Newton.
Vanessa rewound the tape and pressed the play button.
A new voice spoke. Three words.
"It's happening again," said the voice. Then the line went dead. (16)

Vanessa Zephyr and Newton Bellnap are twelve year olds who live in Angel Falls, where the butterflies appear every year. Upon following the butterflies this year, they discover a fruit tree in a hidden garden. The fruit prompts changes in Vanessa and her classmates, which awakens in the town a secret that's been kept for decades. Will the butterflies be returning? Read this kid recommended book The Things with Wings by Gregory J. Holch.

AMY