Read two of her books from college library, can't remember their names though.
One was about a murder mystery on a train (a film was made about it in 70s) and the other was set in Middle East (a book in which everybody ends up marrying each other:lol
I think her books are lulz, if not annoying and overrated. Seems to have a high opinion of herself because she opines about other people's social values and cultures when it is apparent she doesn't know shit about them. Also, the mystery elements due to which she's famous aren't any better. I knew who the culprit was some 10 minutes before it was revealed in that middle east book:8. All of Sherlock Holmes stories I've read along with the third Harry Potter book (Prisoner of Azkaban, the best in that series) did a better job at a surprising and twist ending.
Overall, I think she's overrated.