"Careless in Red" by Elizabeth George
This came up at the library pretty quickly but they do have around 60 copies if you count the fast reads, audio books, large print, and the usual. I've said it before but we really do have an amazing library system. They buy loads of copies of popular books in various formats and I rarely can't find something I read about.
Vintage E.G. and she really kept you going through all 600 pages. I found it hard to put down. A good mystery is always fun summer reading...and winter reading by the fire for that matter.