Hattie Marshall and the Dangerous Fire (Hattie Marshall Series)

In this middle reader, Hattie's sister returns home a month after her wedding because a meddling mother-in-law has made her new life impossible. To make matters worse, her husband, Lester, is gone every night, but he won't say where. Hattie hatches a plan to spy on Lester to ease her troubled sister's mind and reunite the newlyweds.