Hard Crash will be the sixth chapter(seventh, if you count the The Bloodbath of the Burning Plains(chapter) preview) of Turn of the Tides. Captiosus has stated it will be published sometime before February 28, and will most likely follow Eragon Shadeslayer and Master Chief Petty Officer John-117, and the characters who come with them, arriving in Du Weldenvarden. It will follow On Magic and Politics. However, the chapter has yet to come.