What is the resolution in haddix the missing book 3 sabotage?

In "Sabotage," book 3 of the "Missing" series by Margaret Peterson Haddix, the resolution sees the characters continuing to uncover the mystery behind the missing children and the time travel machine. They work together to try to fix the problems caused by the time travel and prevent further sabotage. The book ends on a cliffhanger, setting the stage for the next installment in the series.