I read this recently.
I don't like books where the characters have "obvious" eg dementia/autism etc. It drives me nuts (autistic myself). Was Linda supposed to have autism? Or was she just a bit odd?! Ugh. Why was Terry writing notes to her all the time?
Did her Dad actually sexually assault the girls? How did she know Rebecca was her mum's daughter? I thought she randomly got a catalogue?
She murdered them all then set up her husband, yes?