I can't believe it's taken me this long to realize it - but Nixon has two types of plots -- the first being her more ubiquitous thriller plots, where the protagonists are often whinier but there's a lot of tension and suspense; and the second being her more traditional mystery plots - where the writing is tighter, and the characters are more likable, but usually are lacking the tension and suspense. This is, really, one of the later.
Standard tropes are there -- Texas setting, zany parent, love interest cohort, and someone convoluted plot. But the whole thing is lacking any kind of solid intrigue. And the mystery itself is just kind of... weird. You can tell she wants to go for an Agatha Christie type twisty plot but I don't know if it works all that well.
So, the story is that Jenny and her mystery writer mom (who is just seems to have not much going on in her head) are helping a detective (and detective jr - the love interest) help solve the mystery of a distant relative - a chocolate company heir. It's got some strange Willy Wonka vibes going here.
I think the thing holding this one back is that it's a decent premise but doesn't really go anywhere? The son of the alive company owner is murder, so okay, interesting premise, but there aren't really that many suspects, and not a whole lot of detective work either -- as everything seems to come to Jenny instead of her looking into it.
The love interest, Carlos, is fine but he's a blatant rip off of the guy in Christian Lattamore (only with a better ending). It's funny that these love feel obligatory most of the time -- as if some editor is telling her she has to have a romance in there, because Nixon is often caring more about the mystery than any kind of character building.
One of the funnier elements of this one, though, is that we're finally squarely in the mid/late-90s. There's a lot of talk about computers, and all the things computers can do. Computer hacking is an element of the novel, though it's clear that Nixon doesn't quite know what she's talking about.
Overall, while being relatively a tight read, the book feels a little labored. I wonder if at this point, Nixon who was 70 at the time - and nearing the end of her life - was kind of going through the motion with these. Or maybe it is a ghost writer - I haven't ruled that theory out. Anyway, it's fine, but dull in the way her mystery novels tend to be. At least there's nothing egregiously offensive here.