The diary would be a fascinating read.
I always thought it was interesting how, very early on, the story got around that Sturgis had deliberately seated SJL at a window desk so passing men could letch at her. This claim always sounded quite unlikely to me. However much of a lecher someone might be, does anyone really go into an open-plan office, with no intention of buying a house, just to leer at the sales staff? Genuine question. I'm a bloke and I wouldn't do this; can anyone female confirm that this is a thing that happens?
Anyway, it turns out that this story originated with SJL herself. She made this claim in a diary entry, but AFAIK, there's no evidence for it at all. If you look at the Sturgis office, it's clear that with the possible exception of MG's, every desk is a window desk: it's an all-glass shopfront on a corner. It doesn't sound like any such letching would necessarily have been unwelcome.
Another dubious claim in her diary was that she went for an interview with Sturgis and was "hired on the spot". This is often misrepped as her speculatively walking into a branch and being hired. Actually she went for an interview at head office for something, and KP thought she'd do well in sales. Having established there was a vacancy in a suitable office, she was offered it. This is not much different from how any job gets filled.
The presence of Steve Wright as a contact in her diary is extremely interesting. What are the odds of being personally known to more than one serial killer, at the same time, in the same place?