A dead dwarf, stolen book, and a natural earthquake?! What could be occurring in Candlekeep? And why was the dwarf concerned about a tower known as the Barn Door? Can your characters solve the mystery before it is too late?
There is nothing to say about this adventure. It is a fun adventure that can be run as is.
The only potential thing to consider is why your party is asked to investigate. If that is a question, a good excuse would be that the earthquake has damaged a number of wards that usually protect Candlekeep so the keep guard is too busy protecting against intruders and the sages are all desperately trying to repair the wards before anyone can realize that Candlekeep is vulnerable to intrusion or theft.