I’m fascinated by the whole thing! I gave up reading the book because it immediately didn’t ring true, especially the court case (DP is a lawyer and said it would be extremely unlikely to have happened the way she claimed in the book). I got massively told off for saying so though and for being too cynical and suspicious by friends who loved the book, so I’m now feeling vindicated 😆
I also tried to do a bit of digging around on them, and concluded that her name must be a pseudonym because there was nothing out there about her that wasn’t connected to the book, and no evidence of any court case (which should have been in the public domain). But it’s interesting to find that her pseudonym is quite like a “traditional” pseudonym/nom de plume, if it really is her grandmother’s maiden name plus her own maiden name. (A friend of mine writes thrillers under a pseudonym that is her own middle name plus her grandmother’s maiden name, for example.)
From all the evidence of this loan, plus the odd publishing company and house shenanigans, and his “illness”, it seems the likelihood is that he’s as much involved in it all as she is, which is a bit shocking!