A bridge over a local river is being torn down and replaced, and Lewis, Rose Rita, Uncle Jonathan, and Mrs. Zimmerman are all worried what that will mean. The bridge was more than a public works project - it was build with magic iron to keep something very evil at bay. So Lewis and Rose Rita do some sleuthing to figure out exactly what is lurking under the bridge and who is trying to set it free.
I think Stickland does a nice job of taking over this series, and this is another fun entry. Charlie certainly enjoys them and they make great bedtime read-alouds. ( )