Read "The Big Four" by Christie, Agatha for free. A classic public domain work covering detective and mystery stories, english, murder -- investigation -- fiction, mystery fiction. Available in full text from Project Gutenberg.
Detective and mystery stories, English
Murder -- Investigation -- Fiction
Mystery fiction
Poirot, Hercule (Fictitious character) -- Fiction
Private investigators -- England -- Fiction
Secret societies -- Fiction
This book is in the public domain. Free to read and download from Project Gutenberg.