Hate House - Foster John C.

Reclusive investigator Megan French is lured from isolation by a mysterious client who wants her to investigate the infamous Hate House. Too late, she discovers Hate House isn't a job, it's a trap. Gaslighted and manipulated, French is caught in an elaborate revenge plot seeking to unbalance her mind before framing her for a horrible crime. 

As French unravels the plan, she uncovers a wider world of the ultra wealthy who treat people as nothing more than pieces on a game board.