This time Klem and Ralph are investigating a murder on the Fuse (a colony out in space) with terrorist implications. This case involves Klem's son, the Deputy Mayor, at a time when she plans to retire to Mars. Family plays a large part in this story and it is exciting and interesting to read
Just like any detective story, there is a lot of action and some clever deductions. Bloodshed and death ensue and all the mysteries are cleared up. Given that each volume is a mostly independent story, there's no reason why there should not be a Volume 5. Recommended to any one who likes a detective story.