I think there’s a problem with the Library Under the Sands adventure or quest in Egypt. I completed it for one sim, but then a different sim got the same quest, and no one answers the door at the house with the library in it. I can “Look in Window” and see someone in there, but not the person I’m supposed to talk to. I now have to talk to the same person to deliver a relic, and his icon is above the house, but he doesn’t answer the door. I found an article here that explains a possible work-around: GameFAQs – Library Under the Sands – Broken. It says that the owner of the house is a merchant and is constantly away from the house. It suggests going into Edit mode to add another Sim to the house who will be able to answer the door for you. I’m not sure if this will work, because I see someone in the house who isn’t answering the door. My Sim knocks on the door and an icon of the correct contact appears in the queue, as if he’s going to greet my Sim. But then the queue icon disappears, and my Sim is left standing on the porch waiting. I’ll try out the work-around to see if that helps. Otherwise you have to right-click on the quest to cancel it.