No more "fun" for the Rainbirds, though one of them survives, which is one of the details that differs from the TV plot as I remember. Another is that Detective Sergeant Gavin Troy appears to be an expert though somewhat aggressive driver and not as hopeless as visualized in Midsomer Murders.
Anyway it's an excellent murder mystery, and it doesn't really matter whether you've seen on the telly or not. I even read it after Written in Blood, which is the wrong way around, but I don't think it matters much either. Of course there are introductions to the main characters in this one but I would imagine most feel they know them pretty well already. I believe that the TV producers are generally very fair and true to Caroline Graham's characters, e.g. Troy's homophobia is portrayed expertly.
Graham commands a challenging use of the English language - there's a lot to learn for someone like me. She definitely exhausted my otherwise impressive and ever helpful Oxford Advanced Learner's Dictionary (sixth edition, 2000), though it may well be too much to expect the dictionary to list all flowers by Latin, English and nick name and every sort and shade of bathroom tiles etc.