I have all 4 . I actually found the Claire Powell one ok, She spoke to a lot of Sheila's friends and other people who knew her.
I think the best one is CC's book. Heartbreaking to read in parts, he went through hell.
Hmm. Yes, the Claire Powell book tells you a lot about Sheila, but much of it surmised. IMO. This is why I have such a problem with the other forum, too many blinkered old people presuming that they can understand and predict what Sheila was thinking and feeling. And never wondering what was going on in Bamber's head, when he'd planned, and had the means, motive and opportunity. Never fully explaining why he was so arrogant after the murders. Never explaining why he's coped so well in prison for 30 years, without breaking down in desperation.
Kate Kray has interviewed many "lifers" and says that, with the exception of Harry Roberts, they all claim to be innocent and stitched up. Bamber isn't the only one to plead his innocence....they all do.