Both of the quests you mentioned have worked fine for me. The really old book quest you have to go into the side rooms at the far end of the map, "boss" mobs will spawn and the book will appear in your inventory. If I remember correctly there is no pop up or notification to saw it's complete but once you have the book you can TT and talk to the quest npc again, he will give you the reward. The RTZ quest there is a second floor once you've cleared the first that acts like a KR and multiple RTZ will spawn, you have to go in there and keep killing them.