This is actually my favourite of all the Sweet Valley books. I found it in an airport when it was first released, I'd actually given up with the SVH books by then. This got me back in.
And I've read it over and over as a teen and an adult. The plot is absurd, amusingly bad, twisty turny soap opera stupid but its actually one of the better written ones and very addictive. Having not read any of the other books in this mini series, it was easy to pick up on the plot and know exactly was going on.
And it wraps up in typical SVH madness and a HEA. So while very silly, also extremely fun and enjoyable.