When the puppy they are dog-sitting falls down a hole in the park, Squishy and her "bonus" sisters, the twins Vee and Jesse, discover a tunnel that leads down to the Yarra River in Melbourne, and a secret: the Zoom Mining company is dumping something (toxic waste?) under the public park--and the three girls resolve to expose the company.
year: 2018
call number/section: 1000
subjects: stepsisters, juvenile fiction, twins, hazardous wastes, mining corporations, australia, secrecy, fiction, mines and mineral resources, secrets, melbourne (vic.), juvenile fiction, fiction, australia, detective and mystery fiction