Jessie wants her science fair project to make a difference. So when she gets the chance to test a local creek for pollution, she can't wait to get started. But when things start going wrong with her experiment, Jessie and her siblings don't just have an experiment to investigate, they have a mystery to solve!
| ISBN: | 9780807507988 |
| Publication date: | 1st October 2020 |
| Author: | Gertrude Chandler Warner |
| Illustrator: | Anthony VanArsdale |
| Publisher: | Random House Books for Young Readers an imprint of Random House Children's Books |
| Format: | Paperback |
| Pagination: | 128 pages |
| Series: | The Boxcar Children Mysteries |