This is a really good overview article of Agatha Christie’s writing career, the types of storie she wrote and the indelible characters she created.
Agatha Christie is not just a famous mystery writer, she’s the best selling novelist of all time with over two billion copies sold and a massive fandom that continues long after her death. But if you decide you’d like to see what Christie has to offer, with over 60 novels and 14 short story collections, getting started can be a daunting task. We’ve compiled some basic information about her writing, the best Agatha Christie books, which ones to dip your toe in with, and what to read (and in what order) when
Source: The Best Agatha Christie Books (And Why You Should Read Them)