Eephus
Footballguy
is this a stand alone?The Daughter of Time (1951) by Josephine Tey is historical fiction that's been ranked as one of the greatest mysteries of all-time by panels of crime and mystery writers in both the UK and US. Tey's detective Alan Grant works for Scotland Yard in the mid-20th century but becomes obsessed with a 15th century mystery involving Richard III. Grant is incapacitated from injuries suffered on another case so he can only direct a group of supporting characters from his hospital bed. He's never in any jeopardy but it's fascinating as he uncovers inconsistencies in the historical record to solve the crime.
Ney wrote five other Inspector Grant books over the course of three decades but as far as I can, they just share common characters rather than any overarching superplot. The Daughter of Time is her best known novel and the only one with a non-traditional mystery structure. She died a few months after it was published.