Delve into the captivating world of Hugh Mainwaring, a wealthy financier, as he unknowingly sets off a series of startling events while dictating his final will. That Mainwaring Affair, a best-selling mystery novel first published in 1901, weaves a thrilling tale of detective investigation, riveting courtroom drama, and intriguing family secrets. Join us as we unravel this absorbing story (Summary by J. M. Smallheer).