[Answer] 8. "Murder on the Orient Express", "The Mousetrap", "Death on the Nile".

Step 1 : Introduction to the question "8. "Murder on the Orient Express", "The Mousetrap", "Death on the Nile"."

...1. Edgar Wallace 2. Isaac Asimov 3. Agatha Christie 4. Carl Hiaasen Agatha Christie is the best-selling author of all time in any genre, with the exception of William Shakespeare. She also wrote romances under the name Mary Westmacott.

[Answer] 6. "Murder on the Orient Express", "The Mousetrap", "Death on the Nile".

Step 1 : Introduction to the question "6. "Murder on the Orient Express", "The Mousetrap", "Death on the Nile"."

...1. Edgar Wallace 2. Isaac Asimov 3. Agatha Christie 4. Carl Hiaasen Agatha Christie is the best-selling author of all time in any genre, with the exception of William Shakespeare. She also wrote romances under the name Mary Westmacott.

[Answer] 8. "Murder on the Orient Express", "The Mousetrap", "Death on the Nile".

Step 1 : Introduction to the question "8. "Murder on the Orient Express", "The Mousetrap", "Death on the Nile"."

...1. Agatha Christie 2. Carl Hiaasen 3. Isaac Asimov 4. Edgar Wallace Agatha Christie is the best-selling author of all time in any genre, with the exception of William Shakespeare. She also wrote romances under the name Mary Westmacott.