Lois Duncan

Andi and her brother Bruce start a newspaper for dogs but then dogs start to disappear so they have to find the criminals and bring the dogs home.

Foster children Andi and Bruce have been placed with a flaky couple who care more for their aspiring rock careers than their charges. Their mischievous tendencies repeatedly get them into trouble. After a close call with the local pound, the kids end up searching for Friday, their secretly adopted dog, in an abandoned old hotel where they find several other stray dogs seeking shelter. They, along with three other local kids, begin caring for the strays....

What seemed like an innocent July 4th prank turns deadly for a group of teenagers. While the friends make a pact to keep their crime a secret, someone knows what they did, and will stop at nothing to remind them.