Recommended reading - Gas Light, a play by Patrick Hamilton (1939):

Gas Light

a play by Patrick Hamilton.

Filmed as:

Gaslight (1940), directed by Thorold Dickinson.

Gaslight (1944), directed by George Cukor.

Published by Constable and Company Ltd.

First published 1939.

ASIN: B0DSZRVND4

Paperback.

Description:

This classic Victorian thriller was first produced in 1935. Jack Manningham is slowly, deliberately driving his wife, Bella, insane. He has almost succeeded when help arrives in the form of a former detective, Rough, who believes Manningham to be a thief and murderer. Aided by Bella, Rough proves Manningham's true identity and finally Bella achieves a few moments of sweet revenge for the suffering inflicted on her.