After completing many Fetch Me That Book quests, the latest quest shows no quest marker. When I select the quest in the journal and open the map, the map shows an area near Fort Amol; but there is no marker for the quest anywhere on the map. I used the console to complete the quest (setstage MGR20 200), which allowed me to take another quest. The new quest specified a different book but still opened to the same area of the map with no quest marker. Other types of quests, including Shalidor, still show normal quest markers. How can I get back the markers for the Fetch Me That Book quests?