Wikipedia page about this book: https://en.wikipedia.org/wiki/Unravelled_Knots

Release date is 2022-06-04

The mystery of the khaki tunic -- The mystery of the Ingres masterpiece -- The mystery of the pearl necklace -- The mystery of the Russian Prince -- The mysterious tragedy in Bishop's Road -- The mystery of the Dog's Tooth Cliff -- The Tytherton case -- The mystery of Brudenell Court -- The mystery of the white carnation -- The mystery of the Montmartre hat -- The miser of Maida Vale -- The Fulton Gardens mystery -- A moorland tragedy.

Al Haines

"Unravelled Knots by Baroness Emmuska Orczy Orczy" is a collection of short stories published in 1923-1925. This final installment features the Old Man in the Corner, an armchair detective who solves mysteries purely for entertainment. When a woman returns to a London tea-house after twenty years, she finds him unchanged, still fidgeting with string while unraveling baffling crimes. Through thirteen first-person narratives, she listens to his brilliant deductions, impressed despite her skepticism and pride in her own investigative skills. (This is an automatically generated summary.)

Originally published: United States: George H. Doran, 1923