Task: Question Answering
Input (English): Passage: On a visit to Belgium, married couple Bob and Susie Westlake become involved with wealthy financier, Steve Mordaunt, in the sale and transfer of a collection of rare books. In an attempted burglary at Mordaunt's home, his love interest, Mrs. Rosemary Delgado, is suspected. She was once romantically linked to a gangster and she leads the Westlakes in a search for Achemd's writings, a middle eastern 14th Century seer which has inspired an extreme political group, and thought to be in the collection of rare books that Mourdaunt now owns.
The Westlakes become embroiled in a struggle over the valuable Arabic manuscripts, and when Susie is kidnapped by extremists, Bob works as an assistant to Tom Cookson, a manuscript smuggler who is importing the rare texts the gang are seeking. The extremists demand Mourdaunt turn over his collection of rare books, and plot to incite a revolution across the Middle East but can the Westlakes prevent a serious international situation?. 
Question: What's the last name of the person Susie's kidnappers want Achmed's writings from?
Output (English): Mourdaunt.