For people who love reading mysteries, there are many good ones that were written before your time. Take The Thirty-Nine Steps by John Buchan was first published in October 1915 when the detective genre was emerging. Although this book has a rating of only 3.6 on Goodreads, I really liked it. Reading mysteries is a way to hone your problem solving skills. Click through to read my article, The Thirty-Nine Steps by John Buchan, Book Review.
The 39 Steps 1935 British poster he 39 Steps is a 1935 British thriller film directed by Alfred Hitchcock and starring Robert Donat and Madeleine Carroll. Loosely based on the 1915 adventure novel The Thirty-Nine Steps by John Buchan, the film is about a man in London who tries to help a counter-espionage agent prevent an organisation of spies called The 39 Steps from stealing top secret information.