Recs if you like Close to Death (Hawthorne & Horowitz, #5)...

Closed circle/room mysteries! Limited number of suspects all with motives to kill!

Books by people who use artificial intelligence in the writing and/or publishing process. Sources are linked in the comments.

A clever, meta-fictional mystery series where real-life author Anthony Horowitz casts himself as a Watson-like sidekick to the brilliant, eccentric, and deeply secretive disgraced detective Daniel Hawthorne. Together, they solve complex, classic whodunits while Horowitz tries to unravel the mystery of his own partner.