In my book Divide and Conquer Sera, Dak, and Rig are trying to stop SQ. SQ is trying to go back in time and make themselves more powerful. The SQ are mixed in with the Vikings. They are trying to take over Paris which Sera, Dak, and Rig went back in time and are defending. Sera, Dak, and Rig are building a tower to defend. Dak is interested in history so he goes and looks at the Viking ships to see if the ones in the museum is right. Dak gets caught and they start the war. Dak saves many Vikings and they all like him. The Vikings let Dak on a ship to burn down the bridge to get into Paris. Dak ruins the plan and gets caught. Sera and Rig find out that there supposed to let SQ into Paris. So they have to figure out how to fix history.