It depends on how many Bennett themed puzzles there have been and how many letters she wrote about her book. I am assuming both numbers are quite low. MtheGM does not strike me as the type to be all that easily amazed.

It it an interesting coincidence, I think because of the touching personal story. If the puzzle had been about for example Bill Gates and the paper had been say a page from a Windows manual, it would not have been nearly as interesting.