Fun to listen to but it's certainly not true will rate it as 3.5* as a good horror novel read.

Going with the 'true' elements - it essentially reads like the couple wanted to make up the story of the haunting to a) get some money after losing a load with dodgy dealings and b) disguise and minimise their violence against their children. Possibly some night terrors / paralysis to explain some elements, also some carbon monoxide poisoning. Either way the story doesn't ring true and the parents just don't seem to be on the level at all.

But as a horror novel - 👍