This is a little gem of a book (I only say "little" because these days a lot of mysteries sprawl on for far too many pages: this is just the right length). It arrived about 11:00 a.m. and I had to finish it the same day (a rare occurrence for me now), begrudging every minute "lost" to real life things like having to buy food...
I won't discuss the plot, as the "blurb" says everything you need to know without giving the game away, but what impressed me most was the well-rounded characters (even the pets!). I've never been in a choir (or other church group), but the interactions and personalities ring true of societies of "almost-friends" that I have belonged to and I'm sure most readers will have "I know someone just like that" moments.
The best way I can think of to recommend this is to say that it reminded me of Patricia Cornwell's famous Kay Scarpetta books (though Lorraine has got off to a better start as far as different characters each having a distinctive "voice") and Arturo Perez-Reverte's "The Flanders Panel", allowing for the differences in setting etc.
The best news I've had since finishing it is that there is another book in the pipeline, which I can hardly wait for.
So: buy it and read it now!