<modsnip> She's already stated through her lawyer that she had no inkling of anything amiss in her 27 years of marriage (and who knows how long they knew each other before marriage). What would you propose the topic of this book might be?
Some spouses in unhealthy relationships are accustomed to the dynamic and over time they believe it’s normal. An indirect passive aggressive approach to wearing the victim spouse down by letting it happen without any regard for her and the marriage.
She could be an example of this type of gaslighting. After deprogramming from a life with him she may eventually have a different perspective. Things could mentally come to the surface that were subconsciously suppressed. A book can be therapeutic and helpful to other silenced individuals.